Steam Vapor in Exhaust

Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

I had a similar problem on my 227. I changed everything water lines, pump impeller, thermostat nothing helped. Finally I inspected the exhaust hose, it was the problem! The hose had delaminated. When run at low rpm things worked well, when the rpm increased the flow got behind the innermost liner and caused it to close down. With the new hose I have no problems. Good luck JohnB Cal 227 Gotcha Again On May 24, 2017 2:12 PM, "Michael D md… [at] yahoo.com [Cal_Boats]" < Ca… [at] yahoogroups.com> wrote: > > > Not a Cal specific question, but a diesel exhaust question... from a > previous Cal 2-27 owner... > > Brenda and I bought a Kaufman 47 last year that was professionally > repowered with a Westerbeke 71C around 2006. The boat was used little, and > presently has a total of 238 hours on the meter. The engine is coupled to a > Velvet drive transmission and on to a Walter V-drive unit. > > Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive > to velvet drive to heat exchanger to raw water pump to exhaust elbow. The > engine starts easy and runs smooth. The temperature gauge settles at or > slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is > visible in the exhaust. > > Running the engine over 1800 rpm, the gauge creeps up and the temperature > alarm squeals. Backing the throttle down below 1800 everything goes back to > "normal". > > The impeller was replaced, the heat exchanger is clean as a whistle, the > thermostat has been replaced, and the hot-water heater has been bypassed. > Raw water at the transom exhaust appears to have good flow. > > I am an computer engineer by trade and a mechanic by nearly six decades of > experience. I am puzzled as to what I should do next to diagnose and > troubleshoot this situation. Please advise. > > Regards, > Michael Duvall > s/v Imagine, 1985 Kaufman 47 > PO s/v Magic, 1979 Cal 2-27 > >

Have you checked the water injection elbow into the exhaust? Often these cast iron units will rust/corrode to the point they limit water flow. You said you checked the water flow out the exhaust thru-hull. How? When everything is new, I set engine RPM's at about 1,000, place a 5 gallon bucket with some dive weights in it, so it will stay partially submerged, then have someone on a stopwatch. Go! Place the bucket in the exhaust stream until it fills and record the time. Then a year or so later or when you are having the problems you describe, you may re-test. More that half the engines that are brought to us for rebuild are due to faulty water injection elbows. Yanmars are particularly poorly designed as some models have the water injection above the exhaust valve. I installed a Yanmar powered genset in my Cal 46 in 1987 and immediately had a thick wall stainless steel elbow made. I then placed it lower than the valves. It has 6,600 hours on it. I also change oil and filters often, feed it clean fuel and never overheat or overload it. Tom Vandiver BSH Marine LLC Cal 46 "Satori" for 35 years now From: "John b je… [at] gmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Michael D <md… [at] yahoo.com>; Ca… [at] yahoogroups.com Sent: Wednesday, May 24, 2017 1:44 PM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust I had a similar problem on my 227. I changed everything water lines, pump impeller, thermostat nothing helped. Finally I inspected the exhaust hose, it was the problem! The hose had delaminated. When run at low rpm things worked well, when the rpm increased the flow got behind the innermost liner and caused it to close down. With the new hose I have no problems. Good luck JohnBCal 227 Gotcha Again On May 24, 2017 2:12 PM, "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

Remove the output water hose that is headed to the wet exhaust. TUrn the motor on, (it will be messy) to see if you are getting enough water out of the motor. The fact that there is steam seems to indicate that not enough water is flowing somehow. While the output is off, remove the input hose and route it to an alternate source of water, like a big hose over the side into the water. See if that changes the output flow. The whole idea is to find out where the water flow restriction is occurring. Brian G. LavisCommodore, Sea Scouts, Greater Los Angeles Area Council, Boy Scouts of Am… [at] sbcglobal.net or cell phone at 213-761-6807 From: "John b je… [at] gmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Michael D <md… [at] yahoo.com>; Ca… [at] yahoogroups.com Sent: Wednesday, May 24, 2017 11:44 AM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust I had a similar problem on my 227. I changed everything water lines, pump impeller, thermostat nothing helped. Finally I inspected the exhaust hose, it was the problem! The hose had delaminated. When run at low rpm things worked well, when the rpm increased the flow got behind the innermost liner and caused it to close down. With the new hose I have no problems. Good luck JohnBCal 227 Gotcha Again On May 24, 2017 2:12 PM, "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

On 5/24/17 2:11 PM, Michael D md… [at] yahoo.com [Cal_Boats] wrote: > > > Not a Cal specific question, but a diesel exhaust question... from a > previous Cal 2-27 owner... > > Brenda and I bought a Kaufman 47 last year that was professionally > repowered with a Westerbeke 71C around 2006. ********** WAY too much power for that boat. 50 hp is plenty. > The boat was used little, and presently has a total of 238 hours on > the meter. The engine is coupled to a Velvet drive transmission and on > to a Walter V-drive unit. > > Raw water cooling runs from the thru-hull to raw-water-strainer to > v-drive to velvet drive to heat exchanger to raw water pump to exhaust > elbow. The engine starts easy and runs smooth. The temperature gauge > settles at or slightly above 180F. While motoring at 5 kts or so, > water vapor (steam) is visible in the exhaust. ******* Usually an indication of insufficient raw water volume flow. > > Running the engine over 1800 rpm, the gauge creeps up and the > temperature alarm squeals. Backing the throttle down below 1800 > everything goes back to "normal". ******** At what engine rpm does the boat hit hull speed? > > The impeller was replaced, the heat exchanger is clean as a whistle, > the thermostat has been replaced, and the hot-water heater has been > bypassed. Raw water at the transom exhaust appears to have good flow. > > I am an computer engineer by trade and a mechanic by nearly six > decades of experience. I am puzzled as to what I should do next to > diagnose and troubleshoot this situation. Please advise. ******** Start here - What is the reduction gear ratio? the complete prop details? Joe DeMers > > Regards, > Michael Duvall > s/v Imagine, 1985 Kaufman 47 > PO s/v Magic, 1979 Cal 2-27 > > > -- *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/>*phone & fax (860) 666-2184*

I'll second that. I just went through something very similar on the Yanmar 3YM20 on my Cal-36. After replacing my fuel tank last summer, I briefly ran the motor successfully. Good water visible at the exhaust. The next time I started it, the motor started up, ran smoothly, and then slowly died. After that, it cranked ok and seemed like it was right on the verge of starting, but wouldn't catch. I was sure it had to do with the fuel tank replacement, and was pretty convinced I had air in the line somewhere. I replaced all the lines, replaced all the filters, cleaned the fuel, checked pressures. Eventually, it turned out that it was a completely clogged Yanmar exhaust elbow that just happened to pick that day to cross the line. After removing and cleaning the elbow, the engine started right up and has run smoothly since. I think I'm going to do as Tom did and replace it with something less susceptible to this problem. Any suggestions on ready-made solutions out there? AJ On Wed, May 24, 2017 at 10:59 AM, Tom Vandiver bs… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > > Have you checked the water injection elbow into the exhaust? Often these > cast iron units will rust/corrode to the point they limit water flow. You > said you checked the water flow out the exhaust thru-hull. How? > > When everything is new, I set engine RPM's at about 1,000, place a 5 > gallon bucket with some dive weights in it, so it will stay partially > submerged, then have someone on a stopwatch. Go! Place the bucket in the > exhaust stream until it fills and record the time. Then a year or so later > or when you are having the problems you describe, you may re-test. > > More that half the engines that are brought to us for rebuild are due to > faulty water injection elbows. Yanmars are particularly poorly designed as > some models have the water injection above the exhaust valve. I installed a > Yanmar powered genset in my Cal 46 in 1987 and immediately had a thick wall > stainless steel elbow made. I then placed it lower than the valves. It has > 6,600 hours on it. I also change oil and filters often, feed it clean fuel > and never overheat or overload it. > > Tom Vandiver BSH Marine LLC Cal 46 "Satori" for 35 years now > > >

Good Morning Joe, The Velvet Transmission is 1:1.The Walter V-Drive is 2.05:1.The propeller is a 3-blade MaxProp Classic, 11" pitch (18 degrees). Thanks!Michael Duvall From: "Joe DeMers je… [at] mindspring.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Ca… [at] yahoogroups.com; Michael D <md… [at] yahoo.com> Sent: Wednesday, May 24, 2017 7:30 PM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust On 5/24/17 2:11 PM, Michael D md… [at] yahoo.com [Cal_Boats] wrote: Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. ********** WAY too much power for that boat. 50 hp is plenty. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. ******* Usually an indication of insufficient raw water volume flow. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". ******** At what engine rpm does the boat hit hull speed? The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. ******** Start here - What is the reduction gear ratio? the complete prop details? Joe DeMers Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 PO s/v Magic, 1979 Cal 2-27 -- Joe DeMers - owner Sound Marine Diesel LLC SoundMarineDiesel.comphone & fax (860) 666-2184 -- {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} hr {border:1px solid #d8d8d8;} {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} {margin-bottom:10px;} .yiv8383600221ad {padding:0 0;} .yiv8383600221ad p {margin:0;} .yiv8383600221ad a {color:#0000ff;text-decoration:none;} {font-family:Arial;} {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;} .yiv8383600221ad {margin-bottom:10px;padding:0 0;} {font-family:Verdana;font-size:11px;padding:10px 0;} {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;} span {font-weight:700;} span:first-child {text-transform:uppercase;} span a {color:#5085b6;text-decoration:none;} span span {color:#ff7900;} span .yiv8383600221underline {text-decoration:underline;} .yiv8383600221attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;} .yiv8383600221attach div a {text-decoration:none;} .yiv8383600221attach img {border:none;padding-right:5px;} .yiv8383600221attach label {display:block;margin-bottom:5px;} .yiv8383600221attach label a {text-decoration:none;} blockquote {margin:0 0 0 4px;} .yiv8383600221bold {font-family:Arial;font-size:13px;font-weight:700;} .yiv8383600221bold a {text-decoration:none;} dd.yiv8383600221last p a {font-family:Verdana;font-weight:700;} dd.yiv8383600221last p span {margin-right:10px;font-family:Verdana;font-weight:700;} dd.yiv8383600221last p span.yiv8383600221yshortcuts {margin-right:0;} div.yiv8383600221attach-table div div a {text-decoration:none;} div.yiv8383600221attach-table {width:400px;} div.yiv8383600221file-title a, div.yiv8383600221file-title a:active, div.yiv8383600221file-title a:hover, div.yiv8383600221file-title a:visited {text-decoration:none;} div.yiv8383600221photo-title a, div.yiv8383600221photo-title a:active, div.yiv8383600221photo-title a:hover, div.yiv8383600221photo-title a:visited {text-decoration:none;} div p a span.yiv8383600221yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;} .yiv8383600221green {color:#628c2a;} .yiv8383600221MsoNormal {margin:0 0 0 0;} o {font-size:0;} div {float:left;width:72px;} div div {border:1px solid #666666;height:62px;overflow:hidden;width:62px;} div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;} {font-size:77%;} {font-size:77%;} .yiv8383600221replbq {margin:4px;} div a:first-child {margin-right:2px;padding-right:5px;} {font-size:13px;font-family:Arial, helvetica, clean, sans-serif;} table {font-size:inherit;font:100%;} select, input, textarea {font:99% Arial, Helvetica, clean, sans-serif;} pre, code {font:115% monospace;} * {line-height:1.22em;} {padding-bottom:10px;} p a {font-family:Verdana;} p span {color:#1E66AE;font-weight:700;} {color:#ff7900;font-weight:700;} {margin-bottom:20px;padding:0px;} li a {font-size:130%;text-decoration:none;} li {font-size:77%;list-style-type:square;padding:6px 0;} ul {margin:0;padding:0 0 0 8px;} {font-family:Georgia;} p {margin:0 0 1em 0;} tt {font-size:120%;} ul li:last-child {border-right:none !important;}

On 5/25/17 8:09 AM, Michael D md… [at] yahoo.com [Cal_Boats] wrote: > > > Good Morning Joe, > > The Velvet Transmission is 1:1. > The Walter V-Drive is 2.05:1. > The propeller is a 3-blade MaxProp Classic, 11" pitch (18 degrees). ********** Need the prop diameter Mike. Joe > > Thanks! > Michael Duvall > > > ------------------------------------------------------------------------ > *From:* "Joe DeMers je… [at] mindspring.com [Cal_Boats]" > <Ca… [at] yahoogroups.com> > *To:* Ca… [at] yahoogroups.com; Michael D <md… [at] yahoo.com> > *Sent:* Wednesday, May 24, 2017 7:30 PM > *Subject:* Re: [Cal_Boats] Steam Vapor in Exhaust > > > > On 5/24/17 2:11 PM, Michael D md… [at] yahoo.com <mailto:md… [at] yahoo.com> > [Cal_Boats] wrote: >> Not a Cal specific question, but a diesel exhaust question... from a >> previous Cal 2-27 owner... >> >> Brenda and I bought a Kaufman 47 last year that was professionally >> repowered with a Westerbeke 71C around 2006. > > ********** WAY too much power for that boat. 50 hp is plenty. >> The boat was used little, and presently has a total of 238 hours on >> the meter. The engine is coupled to a Velvet drive transmission and >> on to a Walter V-drive unit. >> >> Raw water cooling runs from the thru-hull to raw-water-strainer to >> v-drive to velvet drive to heat exchanger to raw water pump to >> exhaust elbow. The engine starts easy and runs smooth. The >> temperature gauge settles at or slightly above 180F. While motoring >> at 5 kts or so, water vapor (steam) is visible in the exhaust. > > ******* Usually an indication of insufficient raw water volume flow. >> >> Running the engine over 1800 rpm, the gauge creeps up and the >> temperature alarm squeals. Backing the throttle down below 1800 >> everything goes back to "normal". > > ******** At what engine rpm does the boat hit hull speed? >> >> The impeller was replaced, the heat exchanger is clean as a whistle, >> the thermostat has been replaced, and the hot-water heater has been >> bypassed. Raw water at the transom exhaust appears to have good flow. >> >> I am an computer engineer by trade and a mechanic by nearly six >> decades of experience. I am puzzled as to what I should do next to >> diagnose and troubleshoot this situation. Please advise. > > ******** Start here - > > What is the reduction gear ratio? > > the complete prop details? Joe DeMers >> >> Regards, >> Michael Duvall >> s/v Imagine, 1985 Kaufman 47 >> PO s/v Magic, 1979 Cal 2-27 > > -- > *Joe DeMers - owner* > Sound Marine Diesel LLC > SoundMarineDiesel.com <http://www.soundmarinediesel.com/>*phone & fax > (860) 666-2184* > > > > > -- *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/>*phone & fax (860) 666-2184*

Joe, I don't know what the original engine was, and I don't doubt that the engine may be oversized, although the previous owner had it "professionally" installed. The 71C was purchased as a bobtail and mated to the existing Velvet and Walter units. At this time, I am not going to change it out. The Kaufman 47 weighs in at 30K lbs, has a LWL of 40 ft, and the hull speed is 8.5 kts. I have never tried to motor it that fast so I cannot say what the hull speed RPM is. If this helps, we do get about 5.5 knots, maybe a bit more, at around 1700 RPM. Thanks!Michael Duvall From: "Joe DeMers je… [at] mindspring.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Ca… [at] yahoogroups.com; Michael D <md… [at] yahoo.com> Sent: Thursday, May 25, 2017 8:39 AM Subject: [Cal_Boats] Prop details needed On 5/25/17 8:09 AM, Michael D md… [at] yahoo.com [Cal_Boats] wrote: Good Morning Joe, The Velvet Transmission is 1:1. The Walter V-Drive is 2.05:1. The propeller is a 3-blade MaxProp Classic, 11" pitch (18 degrees). ********** Need the prop diameter Mike. Joe Thanks! Michael Duvall From: "Joe DeMers je… [at] mindspring.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Ca… [at] yahoogroups.com; Michael D <md… [at] yahoo.com> Sent: Wednesday, May 24, 2017 7:30 PM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust On 5/24/17 2:11 PM, Michael D md… [at] yahoo.com [Cal_Boats] wrote: Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. ********** WAY too much power for that boat. 50 hp is plenty. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. ******* Usually an indication of insufficient raw water volume flow. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". ******** At what engine rpm does the boat hit hull speed? The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. ******** Start here - What is the reduction gear ratio? the complete prop details? Joe DeMers Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 PO s/v Magic, 1979 Cal 2-27 -- Joe DeMers - owner Sound Marine Diesel LLC SoundMarineDiesel.comphone & fax (860) 666-2184 -- Joe DeMers - owner Sound Marine Diesel LLC SoundMarineDiesel.comphone & fax (860) 666-2184 -- {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} hr {border:1px solid #d8d8d8;} {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} {margin-bottom:10px;} .yiv4152390221ad {padding:0 0;} .yiv4152390221ad p {margin:0;} .yiv4152390221ad a {color:#0000ff;text-decoration:none;} {font-family:Arial;} {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;} .yiv4152390221ad {margin-bottom:10px;padding:0 0;} {font-family:Verdana;font-size:11px;padding:10px 0;} {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;} span {font-weight:700;} span:first-child {text-transform:uppercase;} span a {color:#5085b6;text-decoration:none;} span span {color:#ff7900;} span .yiv4152390221underline {text-decoration:underline;} .yiv4152390221attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;} .yiv4152390221attach div a {text-decoration:none;} .yiv4152390221attach img {border:none;padding-right:5px;} .yiv4152390221attach label {display:block;margin-bottom:5px;} .yiv4152390221attach label a {text-decoration:none;} blockquote {margin:0 0 0 4px;} .yiv4152390221bold {font-family:Arial;font-size:13px;font-weight:700;} .yiv4152390221bold a {text-decoration:none;} dd.yiv4152390221last p a {font-family:Verdana;font-weight:700;} dd.yiv4152390221last p span {margin-right:10px;font-family:Verdana;font-weight:700;} dd.yiv4152390221last p span.yiv4152390221yshortcuts {margin-right:0;} div.yiv4152390221attach-table div div a {text-decoration:none;} div.yiv4152390221attach-table {width:400px;} div.yiv4152390221file-title a, div.yiv4152390221file-title a:active, div.yiv4152390221file-title a:hover, div.yiv4152390221file-title a:visited {text-decoration:none;} div.yiv4152390221photo-title a, div.yiv4152390221photo-title a:active, div.yiv4152390221photo-title a:hover, div.yiv4152390221photo-title a:visited {text-decoration:none;} div p a span.yiv4152390221yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;} .yiv4152390221green {color:#628c2a;} .yiv4152390221MsoNormal {margin:0 0 0 0;} o {font-size:0;} div {float:left;width:72px;} div div {border:1px solid #666666;height:62px;overflow:hidden;width:62px;} div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;} {font-size:77%;} {font-size:77%;} .yiv4152390221replbq {margin:4px;} div a:first-child {margin-right:2px;padding-right:5px;} {font-size:13px;font-family:Arial, helvetica, clean, sans-serif;} table {font-size:inherit;font:100%;} select, input, textarea {font:99% Arial, Helvetica, clean, sans-serif;} pre, code {font:115% monospace;} * {line-height:1.22em;} {padding-bottom:10px;} p a {font-family:Verdana;} p span {color:#1E66AE;font-weight:700;} {color:#ff7900;font-weight:700;} {margin-bottom:20px;padding:0px;} li a {font-size:130%;text-decoration:none;} li {font-size:77%;list-style-type:square;padding:6px 0;} ul {margin:0;padding:0 0 0 8px;} {font-family:Georgia;} p {margin:0 0 1em 0;} tt {font-size:120%;} ul li:last-child {border-right:none !important;}

You might have wrong pitched Prop..buy a MaxProp. If you Want an ez adjust prop. Plus you pick up 1 knot Under sale On May 24, 2017 11:12 AM, "Michael D md… [at] yahoo.com [Cal_Boats]" < Ca… [at] yahoogroups.com> wrote: > > > Not a Cal specific question, but a diesel exhaust question... from a > previous Cal 2-27 owner... > > Brenda and I bought a Kaufman 47 last year that was professionally > repowered with a Westerbeke 71C around 2006. The boat was used little, and > presently has a total of 238 hours on the meter. The engine is coupled to a > Velvet drive transmission and on to a Walter V-drive unit. > > Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive > to velvet drive to heat exchanger to raw water pump to exhaust elbow. The > engine starts easy and runs smooth. The temperature gauge settles at or > slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is > visible in the exhaust. > > Running the engine over 1800 rpm, the gauge creeps up and the temperature > alarm squeals. Backing the throttle down below 1800 everything goes back to > "normal". > > The impeller was replaced, the heat exchanger is clean as a whistle, the > thermostat has been replaced, and the hot-water heater has been bypassed. > Raw water at the transom exhaust appears to have good flow. > > I am an computer engineer by trade and a mechanic by nearly six decades of > experience. I am puzzled as to what I should do next to diagnose and > troubleshoot this situation. Please advise. > > Regards, > Michael Duvall > s/v Imagine, 1985 Kaufman 47 > PO s/v Magic, 1979 Cal 2-27 > >

Call PVI ask for prop shop.. They can give you a suggestion Of setings based on info .. On May 25, 2017 9:24 AM, "Edward Stancil" <e.… [at] gmail.com> wrote: > You might have wrong pitched > Prop..buy a MaxProp. If you > Want an ez adjust prop. > Plus you pick up 1 knot > Under sale > > On May 24, 2017 11:12 AM, "Michael D md… [at] yahoo.com [Cal_Boats]" < > Ca… [at] yahoogroups.com> wrote: > >> >> >> Not a Cal specific question, but a diesel exhaust question... from a >> previous Cal 2-27 owner... >> >> Brenda and I bought a Kaufman 47 last year that was professionally >> repowered with a Westerbeke 71C around 2006. The boat was used little, and >> presently has a total of 238 hours on the meter. The engine is coupled to a >> Velvet drive transmission and on to a Walter V-drive unit. >> >> Raw water cooling runs from the thru-hull to raw-water-strainer to >> v-drive to velvet drive to heat exchanger to raw water pump to exhaust >> elbow. The engine starts easy and runs smooth. The temperature gauge >> settles at or slightly above 180F. While motoring at 5 kts or so, water >> vapor (steam) is visible in the exhaust. >> >> Running the engine over 1800 rpm, the gauge creeps up and the temperature >> alarm squeals. Backing the throttle down below 1800 everything goes back to >> "normal". >> >> The impeller was replaced, the heat exchanger is clean as a whistle, the >> thermostat has been replaced, and the hot-water heater has been bypassed. >> Raw water at the transom exhaust appears to have good flow. >> >> I am an computer engineer by trade and a mechanic by nearly six decades >> of experience. I am puzzled as to what I should do next to diagnose and >> troubleshoot this situation. Please advise. >> >> Regards, >> Michael Duvall >> s/v Imagine, 1985 Kaufman 47 >> PO s/v Magic, 1979 Cal 2-27 >> >> >

Excuse my ignorance, but here in chilly Northern California waters, I'm often, maybe always, trailing steam from the exhaust. Is this always a sign that something is wrong? > On May 25, 2017, at 9:24 AM, Edward Stancil e.… [at] gmail.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > You might have wrong pitched > Prop..buy a MaxProp. If you > Want an ez adjust prop. > Plus you pick up 1 knot > Under sale > >> On May 24, 2017 11:12 AM, "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: >> >> Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... >> >> Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. >> >> Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. >> >> Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". >> >> The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. >> >> I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. >> >> Regards, >> Michael Duvall >> s/v Imagine, 1985 Kaufman 47 >> PO s/v Magic, 1979 Cal 2-27 > >

I dunno, I've always had a fantasy of having a triple expansion steam engine as my aux. power. LOTS of steam!!Jerry On Wednesday, May 24, 2017 11:44 AM, "John b je… [at] gmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: I had a similar problem on my 227. I changed everything water lines, pump impeller, thermostat nothing helped. Finally I inspected the exhaust hose, it was the problem! The hose had delaminated. When run at low rpm things worked well, when the rpm increased the flow got behind the innermost liner and caused it to close down. With the new hose I have no problems. Good luck JohnBCal 227 Gotcha Again On May 24, 2017 2:12 PM, "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

All, A while back, I posted my issue with steam/vapor emitting from the exhaust. I spent a lot of time trying to narrow down the problem including inspection of the engine heat exchanger, the transmission oil cooler, and the v-drive. Every time I thought I was on to the problem, I proved myself wrong. On Saturday, I hit pay dirt. I think I have found the overheating culprit: it's me. Haha. Let me explain. Right after purchasing our "new" old boat, we replaced the impeller as a precaution. Unfortunately, it was a "new" spare item that had been on the boat for way too long, and it disintegrated within ten hours of running time. Note that the original "professional" installer plumbed the raw-water hoses backwards. When I re-plumbed the raw water lines in the correct path: thru-hull to raw-water-strainer to v-drive, to transmission-oil-cooler to raw-water-pump to engine-heat-exchanger to exhaust-elbow, somewhere along the line, broken impeller pieces were drawn to the input side of the raw-water pump and lodged at the input elbow fitting. I discovered this merely by accident on Saturday, when I was doing an inspection of the raw-water impeller and pump housing and cam. The location of the raw-water pump on our Westerbeke 71C is not all that easy to get to. My vision is not what is was either. Had I not been using a high intensity LED light, I would have never seen the impeller pieces just below the cam on the intake side of the pump. I removed the elbow and cleared the broken impeller pieces. See the attached photo. Merely looking over the stern, there is more water coming out of the exhaust at idle now than there previously was with the engine at 1500+ RPM. My wife and I have not yet had the chance to "sea trial" our success, but I think we have solved the problem with water vapor in the exhaust and overheating problems. Regards,Michael Duvalls/v Imagine, 1985 Kaufman 47 CutterPO s/v Magic, 1979 Cal 2-27 Pompano Beach, FL From: "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Cal_Boats <ca… [at] yahoogroups.com> Sent: Wednesday, May 24, 2017 2:12 PM Subject: [Cal_Boats] Steam Vapor in Exhaust Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

i have been told to store replacement impellers in a container of antifreeze. They should remain pliable like new. reggie Sent from Outlook<http://aka.ms/weboutlook> From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 6:36 AM To: Ca… [at] yahoogroups.com; Michael D Subject: Re: [Cal_Boats] Steam Vapor in Exhaust [1 Attachment] [Attachment(s) from Michael D included below] All, A while back, I posted my issue with steam/vapor emitting from the exhaust. I spent a lot of time trying to narrow down the problem including inspection of the engine heat exchanger, the transmission oil cooler, and the v-drive. Every time I thought I was on to the problem, I proved myself wrong. On Saturday, I hit pay dirt. I think I have found the overheating culprit: it's me. Haha. Let me explain. Right after purchasing our "new" old boat, we replaced the impeller as a precaution. Unfortunately, it was a "new" spare item that had been on the boat for way too long, and it disintegrated within ten hours of running time. Note that the original "professional" installer plumbed the raw-water hoses backwards. When I re-plumbed the raw water lines in the correct path: thru-hull to raw-water-strainer to v-drive, to transmission-oil-cooler to raw-water-pump to engine-heat-exchanger to exhaust-elbow, somewhere along the line, broken impeller pieces were drawn to the input side of the raw-water pump and lodged at the input elbow fitting. I discovered this merely by accident on Saturday, when I was doing an inspection of the raw-water impeller and pump housing and cam. The location of the raw-water pump on our Westerbeke 71C is not all that easy to get to. My vision is not what is was either. Had I not been using a high intensity LED light, I would have never seen the impeller pieces just below the cam on the intake side of the pump. I removed the elbow and cleared the broken impeller pieces. See the attached photo. Merely looking over the stern, there is more water coming out of the exhaust at idle now than there previously was with the engine at 1500+ RPM. My wife and I have not yet had the chance to "sea trial" our success, but I think we have solved the problem with water vapor in the exhaust and overheating problems. Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 Cutter PO s/v Magic, 1979 Cal 2-27 Pompano Beach, FL From: "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Cal_Boats <ca… [at] yahoogroups.com> Sent: Wednesday, May 24, 2017 2:12 PM Subject: [Cal_Boats] Steam Vapor in Exhaust Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 PO s/v Magic, 1979 Cal 2-27

Reggie, Great idea. What do you recommend for a sealed container, besides a glass (yikes) mason jar? Anything plastic & rugged that you know of? Michael From: "r good my… [at] hotmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: "Ca… [at] yahoogroups.com" <Ca… [at] yahoogroups.com>; Michael D <md… [at] yahoo.com> Sent: Tuesday, June 20, 2017 9:08 AM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust i have been told to store replacement impellers in a container of antifreeze. They should remain pliable like new.reggie Sent from Outlook From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 6:36 AM To: Ca… [at] yahoogroups.com; Michael D Subject: Re: [Cal_Boats] Steam Vapor in Exhaust [1 Attachment] [Attachment(s) from Michael D included below]All, A while back, I posted my issue with steam/vapor emitting from the exhaust. I spent a lot of time trying to narrow down the problem including inspection of the engine heat exchanger, the transmission oil cooler, and the v-drive. Every time I thought I was on to the problem, I proved myself wrong. On Saturday, I hit pay dirt. I think I have found the overheating culprit: it's me. Haha. Let me explain. Right after purchasing our "new" old boat, we replaced the impeller as a precaution. Unfortunately, it was a "new" spare item that had been on the boat for way too long, and it disintegrated within ten hours of running time. Note that the original "professional" installer plumbed the raw-water hoses backwards. When I re-plumbed the raw water lines in the correct path: thru-hull to raw-water-strainer to v-drive, to transmission-oil-cooler to raw-water-pump to engine-heat-exchanger to exhaust-elbow, somewhere along the line, broken impeller pieces were drawn to the input side of the raw-water pump and lodged at the input elbow fitting. I discovered this merely by accident on Saturday, when I was doing an inspection of the raw-water impeller and pump housing and cam. The location of the raw-water pump on our Westerbeke 71C is not all that easy to get to. My vision is not what is was either. Had I not been using a high intensity LED light, I would have never seen the impeller pieces just below the cam on the intake side of the pump. I removed the elbow and cleared the broken impeller pieces. See the attached photo. Merely looking over the stern, there is more water coming out of the exhaust at idle now than there previously was with the engine at 1500+ RPM. My wife and I have not yet had the chance to "sea trial" our success, but I think we have solved the problem with water vapor in the exhaust and overheating problems. Regards,Michael Duvalls/v Imagine, 1985 Kaufman 47 CutterPO s/v Magic, 1979 Cal 2-27 Pompano Beach, FL From: "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Cal_Boats <ca… [at] yahoogroups.com> Sent: Wednesday, May 24, 2017 2:12 PM Subject: [Cal_Boats] Steam Vapor in Exhaust Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27

anything that works. I'm using a plastic jar for now. small mayonnaise. R Sent from Outlook<http://aka.ms/weboutlook> From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 12:20 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] Steam Vapor in Exhaust Reggie, Great idea. What do you recommend for a sealed container, besides a glass (yikes) mason jar? Anything plastic & rugged that you know of? Michael From: "r good my… [at] hotmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: "Ca… [at] yahoogroups.com" <Ca… [at] yahoogroups.com>; Michael D <md… [at] yahoo.com> Sent: Tuesday, June 20, 2017 9:08 AM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust i have been told to store replacement impellers in a container of antifreeze. They should remain pliable like new. reggie Sent from Outlook<http://aka.ms/weboutlook> From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 6:36 AM To: Ca… [at] yahoogroups.com; Michael D Subject: Re: [Cal_Boats] Steam Vapor in Exhaust [1 Attachment] [Attachment(s)<https://mg.mail.yahoo.com/neo/launch?.rand=blu78615h80gu#TopText> from Michael D included below] All, A while back, I posted my issue with steam/vapor emitting from the exhaust. I spent a lot of time trying to narrow down the problem including inspection of the engine heat exchanger, the transmission oil cooler, and the v-drive. Every time I thought I was on to the problem, I proved myself wrong. On Saturday, I hit pay dirt. I think I have found the overheating culprit: it's me. Haha. Let me explain. Right after purchasing our "new" old boat, we replaced the impeller as a precaution. Unfortunately, it was a "new" spare item that had been on the boat for way too long, and it disintegrated within ten hours of running time. Note that the original "professional" installer plumbed the raw-water hoses backwards. When I re-plumbed the raw water lines in the correct path: thru-hull to raw-water-strainer to v-drive, to transmission-oil-cooler to raw-water-pump to engine-heat-exchanger to exhaust-elbow, somewhere along the line, broken impeller pieces were drawn to the input side of the raw-water pump and lodged at the input elbow fitting. I discovered this merely by accident on Saturday, when I was doing an inspection of the raw-water impeller and pump housing and cam. The location of the raw-water pump on our Westerbeke 71C is not all that easy to get to. My vision is not what is was either. Had I not been using a high intensity LED light, I would have never seen the impeller pieces just below the cam on the intake side of the pump. I removed the elbow and cleared the broken impeller pieces. See the attached photo. Merely looking over the stern, there is more water coming out of the exhaust at idle now than there previously was with the engine at 1500+ RPM. My wife and I have not yet had the chance to "sea trial" our success, but I think we have solved the problem with water vapor in the exhaust and overheating problems. Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 Cutter PO s/v Magic, 1979 Cal 2-27 Pompano Beach, FL From: "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Cal_Boats <ca… [at] yahoogroups.com> Sent: Wednesday, May 24, 2017 2:12 PM Subject: [Cal_Boats] Steam Vapor in Exhaust Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvall s/v Imagine, 1985 Kaufman 47 PO s/v Magic, 1979 Cal 2-27

Reggie,I don't store mine for long, I replace it every two years. Had one fail on my way out for the season a number of years ago, managed to get back to the dock before serious overheating, changed the impeller but it still ran hot. Finally took it apart again, stuck my finger in the outlet port and bingo, impeller blade. I have my spare mounted on a spare shaft so I don't have to try to manage to get the snap ring off and on while on a boat that is rocking and rolling. Just pull the old out and insert the spare. Also I installed Moyer Marine's quick change end plate. Four thumb screws, comes off in seconds. Atomic 4. If you want to extend the life of the impeller remove it if you spend the winter on the hard. I decided it's cheap insurance to replace it every two years, but I still carry the spare!David Dobbs CAL29 411 On Tuesday, June 20, 2017 1:38 PM, "r good my… [at] hotmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: anything that works. I'm using a plastic jar for now. small mayonnaise.R Sent from Outlook From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 12:20 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] Steam Vapor in Exhaust Reggie, Great idea. What do you recommend for a sealed container, besides a glass (yikes) mason jar? Anything plastic & rugged that you know of? Michael From: "r good my… [at] hotmail.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: "Ca… [at] yahoogroups.com" <Ca… [at] yahoogroups.com>; Michael D <md… [at] yahoo.com> Sent: Tuesday, June 20, 2017 9:08 AM Subject: Re: [Cal_Boats] Steam Vapor in Exhaust i have been told to store replacement impellers in a container of antifreeze. They should remain pliable like new.reggie Sent from Outlook From: Ca… [at] yahoogroups.com <Ca… [at] yahoogroups.com> on behalf of Michael D md… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> Sent: Tuesday, June 20, 2017 6:36 AM To: Ca… [at] yahoogroups.com; Michael D Subject: Re: [Cal_Boats] Steam Vapor in Exhaust [1 Attachment] [Attachment(s) from Michael D included below]All, A while back, I posted my issue with steam/vapor emitting from the exhaust. I spent a lot of time trying to narrow down the problem including inspection of the engine heat exchanger, the transmission oil cooler, and the v-drive. Every time I thought I was on to the problem, I proved myself wrong. On Saturday, I hit pay dirt. I think I have found the overheating culprit: it's me. Haha. Let me explain. Right after purchasing our "new" old boat, we replaced the impeller as a precaution. Unfortunately, it was a "new" spare item that had been on the boat for way too long, and it disintegrated within ten hours of running time. Note that the original "professional" installer plumbed the raw-water hoses backwards. When I re-plumbed the raw water lines in the correct path: thru-hull to raw-water-strainer to v-drive, to transmission-oil-cooler to raw-water-pump to engine-heat-exchanger to exhaust-elbow, somewhere along the line, broken impeller pieces were drawn to the input side of the raw-water pump and lodged at the input elbow fitting. I discovered this merely by accident on Saturday, when I was doing an inspection of the raw-water impeller and pump housing and cam. The location of the raw-water pump on our Westerbeke 71C is not all that easy to get to. My vision is not what is was either. Had I not been using a high intensity LED light, I would have never seen the impeller pieces just below the cam on the intake side of the pump. I removed the elbow and cleared the broken impeller pieces. See the attached photo. Merely looking over the stern, there is more water coming out of the exhaust at idle now than there previously was with the engine at 1500+ RPM. My wife and I have not yet had the chance to "sea trial" our success, but I think we have solved the problem with water vapor in the exhaust and overheating problems. Regards,Michael Duvalls/v Imagine, 1985 Kaufman 47 CutterPO s/v Magic, 1979 Cal 2-27 Pompano Beach, FL From: "Michael D md… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> To: Cal_Boats <ca… [at] yahoogroups.com> Sent: Wednesday, May 24, 2017 2:12 PM Subject: [Cal_Boats] Steam Vapor in Exhaust Not a Cal specific question, but a diesel exhaust question... from a previous Cal 2-27 owner... Brenda and I bought a Kaufman 47 last year that was professionally repowered with a Westerbeke 71C around 2006. The boat was used little, and presently has a total of 238 hours on the meter. The engine is coupled to a Velvet drive transmission and on to a Walter V-drive unit. Raw water cooling runs from the thru-hull to raw-water-strainer to v-drive to velvet drive to heat exchanger to raw water pump to exhaust elbow. The engine starts easy and runs smooth. The temperature gauge settles at or slightly above 180F. While motoring at 5 kts or so, water vapor (steam) is visible in the exhaust. Running the engine over 1800 rpm, the gauge creeps up and the temperature alarm squeals. Backing the throttle down below 1800 everything goes back to "normal". The impeller was replaced, the heat exchanger is clean as a whistle, the thermostat has been replaced, and the hot-water heater has been bypassed. Raw water at the transom exhaust appears to have good flow. I am an computer engineer by trade and a mechanic by nearly six decades of experience. I am puzzled as to what I should do next to diagnose and troubleshoot this situation. Please advise. Regards, Michael Duvalls/v Imagine, 1985 Kaufman 47PO s/v Magic, 1979 Cal 2-27