Re: [Cal_Boats] Re: Cal 33 - exhaust submerging

I thought about prop pitch as a potential cause, but it also "squats" under sail only. -------------------------------------------- On Mon, 3/20/17, js… [at] gmail.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging To: Ca… [at] yahoogroups.com Date: Monday, March 20, 2017, 6:32 AM If you have an adjustable prop take a little of the pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love it. Whe I first installed it I had over pitched it a smidge though and while acceleration under power was great it buried the exhaust at 2200 rpm. Now perfectly pitched I am at hull speed, with a clear exhaust and incredible maneuvering agility. Love my Kiwi prop! With the exhaust buried you are dragging the transom through the water and motoring at a disadvantageous angle...slow and inefficient! Cheers,Jay

Claude,I believe that, regardless if under sail or power, a displacement hull will "squat" as it approaches hull speed. This is not a problem when motoring because sea water will not force its way upstream against exhaust pressure. It CAN be a problem when sailing and that is why the exhaust hose must be routed above the sailing waterline before it attaches to the engine. This issue can be compounded by a following sea.Chris 33-2 Damiana On Monday, March 20, 2017 5:24 PM, "Claude Roberts uw… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: I thought about prop pitch as a potential cause, but it also "squats" under sail only. -------------------------------------------- On Mon, 3/20/17, js… [at] gmail.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging To: Ca… [at] yahoogroups.com Date: Monday, March 20, 2017, 6:32 AM If you have an adjustable prop take a little of the pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love it. Whe I first installed it I had over pitched it a smidge though and while acceleration under power was great it buried the exhaust at 2200 rpm. Now perfectly pitched I am at hull speed, with a clear exhaust and incredible maneuvering agility. Love my Kiwi prop! With the exhaust buried you are dragging the transom through the water and motoring at a disadvantageous angle...slow and inefficient! Cheers,Jay

I have read these concerns and recently checked my boat. The exhaust hose and the bilge pump are both routed well above waterline and then down to the outlets making it impossible for water to flow from the sea to the engine or the bilge. I have been in huge seas and motored in steep chop and have never had a problem with water entering the boat. Don Dutton 1986 Cal 33-2, “Quantum Evolution” > On Mar 20, 2017, at 7:22 PM, Christopher Thompson ra… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > > Claude, > I believe that, regardless if under sail or power, a displacement hull will "squat" as it approaches hull speed. > > This is not a problem when motoring because sea water will not force its way upstream against exhaust pressure. It CAN be a problem when sailing and that is why the exhaust hose must be routed above the sailing waterline before it attaches to the engine. This issue can be compounded by a following sea. > Chris 33-2 Damiana > > > On Monday, March 20, 2017 5:24 PM, "Claude Roberts uw… [at] yahoo.com <mailto:uw… [at] yahoo.com> [Cal_Boats]" <Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com>> wrote: > > > > I thought about prop pitch as a potential cause, but it also "squats" under sail only. > > -------------------------------------------- > On Mon, 3/20/17, js… [at] gmail.com <mailto:js… [at] gmail.com> [Cal_Boats] <Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com>> wrote: > > Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging > To: Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com> > Date: Monday, March 20, 2017, 6:32 AM > > > > > > > > > > > > > If you have an adjustable prop take a little of the > pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love > it. Whe I first installed it I had over pitched it a smidge > though and while acceleration under power was great it > buried the exhaust at 2200 rpm. Now perfectly pitched I am > at hull speed, with a clear exhaust and incredible > maneuvering agility. Love my Kiwi prop! > > With the exhaust buried you are dragging the > transom through the water and motoring at a disadvantageous > angle...slow and inefficient! > Cheers,Jay > > > > > > > > > > -- > { > margin:10px > 0;padding:0 10px;} > > hr { > } > > { > color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px > 0;} > > { > margin-bottom:10px;} > > .yiv3882473351ad { > } > > .yiv3882473351ad p { > } > > .yiv3882473351ad a { > color:#0000ff;text-decoration:none;} > > { > } > > > { > margin:10px > 0px;font-weight:700;font-size:78%;line-height:122%;} > > > .yiv3882473351ad { > margin-bottom:10px;padding:0 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 > .yiv3882473351underline { > text-decoration:underline;} > > .yiv3882473351attach { > clear:both;display:table;font-family:Arial;font-size:12px;padding:10px > 0;width:400px;} > > .yiv3882473351attach div a { > text-decoration:none;} > > .yiv3882473351attach img { > padding-right:5px;} > > .yiv3882473351attach label { > display:block;margin-bottom:5px;} > > .yiv3882473351attach label a { > text-decoration:none;} > > blockquote { > } > > .yiv3882473351bold { > font-weight:700;} > > .yiv3882473351bold a { > text-decoration:none;} > > dd.yiv3882473351last p a { > font-weight:700;} > > dd.yiv3882473351last p span { > margin-right:10px;font-family:Verdana;font-weight:700;} > > dd.yiv3882473351last p > span.yiv3882473351yshortcuts { > margin-right:0;} > > div.yiv3882473351attach-table div div a { > text-decoration:none;} > > div.yiv3882473351attach-table { > } > > div.yiv3882473351file-title a, > div.yiv3882473351file-title a:active, > div.yiv3882473351file-title a:hover, > div.yiv3882473351file-title a:visited { > text-decoration:none;} > > div.yiv3882473351photo-title a, > div.yiv3882473351photo-title a:active, > div.yiv3882473351photo-title a:hover, > div.yiv3882473351photo-title a:visited { > text-decoration:none;} > > div > p a span.yiv3882473351yshortcuts { > font-weight:normal;} > > .yiv3882473351green { > color:#628c2a;} > > .yiv3882473351MsoNormal { > } > > o { > } > > 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;} > > { > } > > { > } > > .yiv3882473351replbq { > } > > div a:first-child { > margin-right:2px;padding-right:5px;} > > { > font-family:Arial, helvetica, clean, > sans-serif;} > > table { > font:100%;} > > select, > input, textarea { > font:99% Arial, Helvetica, clean, sans-serif;} > > pre, > code { > font:115% monospace;} > > * { > } > > { > padding-bottom:10px;} > > > p a { > } > > > p span { > color:#1E66AE;font-weight:700;} > > > { > color:#ff7900;font-weight:700;} > > { > margin-bottom:20px;padding:0px;} > > > li a { > text-decoration:none;} > > > li { > list-style-type:square;padding:6px 0;} > > > ul { > } > > { > } > > p { > } > > tt { > } > > ul li:last-child { > border-right:none !important; > } > > > > > >

Someone makes an exhaust part that goes right at the transom that takes the exhaust straight up from the outlet from the viewpoint of a wave. Think of what a wave is going to see as it hits your transom. Is it going to see a nice smooth curve and be able to flow uphill if it is strong enough? Or is it going to see the wall of the pipe section after a right angle bend. I think I put an elbow right there as I didn't have room for the fancy part. My engine was getting flooded both by heeling enough to put the entire exhaust under the water line, but also by following waves when surfing into the GG. I also put a rubber flap on the exhaust that are normally associated with power boats. I only had the flooding problem for a year after Svendsen's replaced the original exhaust system. On Mon, Mar 20, 2017 at 8:31 PM, Donald C Dutton dn… [at] comcast.net [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > > I have read these concerns and recently checked my boat. The exhaust hose > and the bilge pump are both routed well above waterline and then down to > the outlets making it impossible for water to flow from the sea to the > engine or the bilge. I have been in huge seas and motored in steep chop > and have never had a problem with water entering the boat. > > Don Dutton > 1986 Cal 33-2, “Quantum Evolution” > > > On Mar 20, 2017, at 7:22 PM, Christopher Thompson ra… [at] yahoo.com > [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > > Claude, > I believe that, regardless if under sail or power, a displacement hull > will "squat" as it approaches hull speed. > > This is not a problem when motoring because sea water will not force its > way upstream against exhaust pressure. It CAN be a problem when sailing and > that is why the exhaust hose must be routed above the sailing waterline > before it attaches to the engine. This issue can be compounded by a > following sea. > Chris 33-2 Damiana > > > On Monday, March 20, 2017 5:24 PM, "Claude Roberts uw… [at] yahoo.com [Cal_Boats]" > <Ca… [at] yahoogroups.com> wrote: > > > > I thought about prop pitch as a potential cause, but it also "squats" > under sail only. > > -------------------------------------------- > On Mon, 3/20/17, js… [at] gmail.com [Cal_Boats] < > Ca… [at] yahoogroups.com> wrote: > > Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging > To: Ca… [at] yahoogroups.com > Date: Monday, March 20, 2017, 6:32 AM > > > > > > > > > > > > > If you have an adjustable prop take a little of the > pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love > it. Whe I first installed it I had over pitched it a smidge > though and while acceleration under power was great it > buried the exhaust at 2200 rpm. Now perfectly pitched I am > at hull speed, with a clear exhaust and incredible > maneuvering agility. Love my Kiwi prop! > > With the exhaust buried you are dragging the > transom through the water and motoring at a disadvantageous > angle...slow and inefficient! > Cheers,Jay > > > > > > > > > > -- > { > margin:10px > 0;padding:0 10px;} > > hr { > } > > { > color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px > 0;} > > { > margin-bottom:10px;} > > .yiv3882473351ad { > } > > .yiv3882473351ad p { > } > > .yiv3882473351ad a { > color:#0000ff;text-decoration:none;} > > { > } > > > { > margin:10px > 0px;font-weight:700;font-size:78%;line-height:122%;} > > > .yiv3882473351ad { > margin-bottom:10px;padding:0 0;} > > { > } > > { > background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px; > } > > span { > font-weight:700;} > > span:first-child { > text-transform:uppercase;} > > span a { > color:#5085b6;text-decoration:none;} > > span span { > color:#ff7900;} > > span > .yiv3882473351underline { > text-decoration:underline;} > > .yiv3882473351attach { > clear:both;display:table;font-family:Arial;font-size:12px;padding:10px > 0;width:400px;} > > .yiv3882473351attach div a { > text-decoration:none;} > > .yiv3882473351attach img { > padding-right:5px;} > > .yiv3882473351attach label { > display:block;margin-bottom:5px;} > > .yiv3882473351attach label a { > text-decoration:none;} > > blockquote { > } > > .yiv3882473351bold { > font-weight:700;} > > .yiv3882473351bold a { > text-decoration:none;} > > dd.yiv3882473351last p a { > font-weight:700;} > > dd.yiv3882473351last p span { > margin-right:10px;font-family:Verdana;font-weight:700;} > > dd.yiv3882473351last p > span.yiv3882473351yshortcuts { > margin-right:0;} > > div.yiv3882473351attach-table div div a { > text-decoration:none;} > > div.yiv3882473351attach-table { > } > > div.yiv3882473351file-title a, > div.yiv3882473351file-title a:active, > div.yiv3882473351file-title a:hover, > div.yiv3882473351file-title a:visited { > text-decoration:none;} > > div.yiv3882473351photo-title a, > div.yiv3882473351photo-title a:active, > div.yiv3882473351photo-title a:hover, > div.yiv3882473351photo-title a:visited { > text-decoration:none;} > > div > p a span.yiv3882473351yshortcuts { > font-weight:normal;} > > .yiv3882473351green { > color:#628c2a;} > > .yiv3882473351MsoNormal { > } > > o { > } > > 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;} > > { > } > > { > } > > .yiv3882473351replbq { > } > > div a:first-child { > margin-right:2px;padding-right:5px;} > > { > font-family:Arial, helvetica, clean, > sans-serif;} > > table { > font:100%;} > > select, > input, textarea { > font:99% Arial, Helvetica, clean, sans-serif;} > > pre, > code { > font:115% monospace;} > > * { > } > > { > padding-bottom:10px;} > > > p a { > } > > > p span { > color:#1E66AE;font-weight:700;} > > > { > color:#ff7900;font-weight:700;} > > { > margin-bottom:20px;padding:0px;} > > > li a { > text-decoration:none;} > > > li { > list-style-type:square;padding:6px 0;} > > > ul { > } > > { > } > > p { > } > > tt { > } > > ul li:last-child { > border-right:none !important; > } > > > > > > > >

At a Caltopia several years ago, I met someone that had experienced problems with large following seas back flooding the muffler on a Cal 2-39. This is in spite of the high loop in the exhaust, right up to the top inside the aft coaming. His solution was a ping pong ball on a tether with which he plugged the exhaust thru hull when seas were up. Starting the engine would blow the plug out, hence the tether. I have considered adding a Centek exhaust check valve. https://www.centekindustries.com/ Regards, Duane Duane Knize S/V Marlyn 1978 Cal 2-39 #18 berthed: Emeryville, CA kn… [at] san.rr.com On 3/21/2017 7:16 AM, Allen Edwards al… [at] gmail.com [Cal_Boats] wrote: > Someone makes an exhaust part that goes right at the transom that > takes the exhaust straight up from the outlet from the viewpoint of a > wave. Think of what a wave is going to see as it hits your transom. > Is it going to see a nice smooth curve and be able to flow uphill if > it is strong enough? Or is it going to see the wall of the pipe > section after a right angle bend. I think I put an elbow right there > as I didn't have room for the fancy part. My engine was getting > flooded both by heeling enough to put the entire exhaust under the > water line, but also by following waves when surfing into the GG. I > also put a rubber flap on the exhaust that are normally associated > with power boats. I only had the flooding problem for a year after > Svendsen's replaced the original exhaust system. > > On Mon, Mar 20, 2017 at 8:31 PM, Donald C Dutton dn… [at] comcast.net > <mailto:dn… [at] comcast.net> [Cal_Boats] <Ca… [at] yahoogroups.com > <mailto:Ca… [at] yahoogroups.com>> wrote: > > I have read these concerns and recently checked my boat. The > exhaust hose and the bilge pump are both routed well above > waterline and then down to the outlets making it impossible for > water to flow from the sea to the engine or the bilge. I have > been in huge seas and motored in steep chop and have never had a > problem with water entering the boat. > > > Don Dutton > 1986 Cal 33-2, “Quantum Evolution” > > >> On Mar 20, 2017, at 7:22 PM, Christopher Thompson >> ra… [at] yahoo.com <mailto:ra… [at] yahoo.com> >> [Cal_Boats] <Ca… [at] yahoogroups.com >> <mailto:Ca… [at] yahoogroups.com>> wrote: >> >> >> Claude, >> I believe that, regardless if under sail or power, a displacement >> hull will "squat" as it approaches hull speed. >> >> This is not a problem when motoring because sea water will not >> force its way upstream against exhaust pressure. It CAN be a >> problem when sailing and that is why the exhaust hose must be >> routed above the sailing waterline before it attaches to the >> engine. This issue can be compounded by a following sea. >> Chris 33-2 Damiana >> >> >> On Monday, March 20, 2017 5:24 PM, "Claude >> Ro… [at] yahoo.com <mailto:uw… [at] yahoo.com>[Cal_Boats]" >> <Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com>> wrote: >> >> >> I thought about prop pitch as a potential cause, but it also >> "squats" under sail only. >> >> -------------------------------------------- >> On Mon, 3/20/17,js… [at] gmail.com >> <mailto:js… [at] gmail.com>[Cal_Boats] >> <Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com>> wrote: >> >> Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging >> To:Ca… [at] yahoogroups.com <mailto:Ca… [at] yahoogroups.com> >> Date: Monday, March 20, 2017, 6:32 AM >> >> >> >> >> >> >> >> >> >> >> >> >> If you have an adjustable prop take a little of the >> pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love >> it. Whe I first installed it I had over pitched it a smidge >> though and while acceleration under power was great it >> buried the exhaust at 2200 rpm. Now perfectly pitched I am >> at hull speed, with a clear exhaust and incredible >> maneuvering agility. Love my Kiwi prop! >> >> With the exhaust buried you are dragging the >> transom through the water and motoring at a disadvantageous >> angle...slow and inefficient! >> Cheers,Jay >> >> >> >> >> >> >> >> >> >> -- >> { >> margin:10px >> 0;padding:0 10px;} >> >> hr { >> } >> >> { >> color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px >> 0;} >> >> { >> margin-bottom:10px;} >> >> .yiv3882473351ad { >> } >> >> .yiv3882473351ad p { >> } >> >> .yiv3882473351ad a { >> color:#0000ff;text-decoration:none;} >> >> { >> } >> >> >> { >> margin:10px >> 0px;font-weight:700;font-size:78%;line-height:122%;} >> >> >> .yiv3882473351ad { >> margin-bottom:10px;padding:0 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 >> .yiv3882473351underline { >> text-decoration:underline;} >> >> .yiv3882473351attach { >> clear:both;display:table;font-family:Arial;font-size:12px;padding:10px >> 0;width:400px;} >> >> .yiv3882473351attach div a { >> text-decoration:none;} >> >> .yiv3882473351attach img { >> padding-right:5px;} >> >> .yiv3882473351attach label { >> display:block;margin-bottom:5px;} >> >> .yiv3882473351attach label a { >> text-decoration:none;} >> >> blockquote { >> } >> >> .yiv3882473351bold { >> font-weight:700;} >> >> .yiv3882473351bold a { >> text-decoration:none;} >> >> dd.yiv3882473351last p a { >> font-weight:700;} >> >> dd.yiv3882473351last p span { >> margin-right:10px;font-family:Verdana;font-weight:700;} >> >> dd.yiv3882473351last p >> span.yiv3882473351yshortcuts { >> margin-right:0;} >> >> div.yiv3882473351attach-table div div a { >> text-decoration:none;} >> >> div.yiv3882473351attach-table { >> } >> >> div.yiv3882473351file-title a, >> div.yiv3882473351file-title a:active, >> div.yiv3882473351file-title a:hover, >> div.yiv3882473351file-title a:visited { >> text-decoration:none;} >> >> div.yiv3882473351photo-title a, >> div.yiv3882473351photo-title a:active, >> div.yiv3882473351photo-title a:hover, >> div.yiv3882473351photo-title a:visited { >> text-decoration:none;} >> >> div >> p a span.yiv3882473351yshortcuts { >> font-weight:normal;} >> >> .yiv3882473351green { >> color:#628c2a;} >> >> .yiv3882473351MsoNormal { >> } >> >> o { >> } >> >> 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;} >> >> { >> } >> >> { >> } >> >> .yiv3882473351replbq { >> } >> >> div a:first-child { >> margin-right:2px;padding-right:5px;} >> >> { >> font-family:Arial, helvetica, clean, >> sans-serif;} >> >> table { >> font:100%;} >> >> select, >> input, textarea { >> font:99% Arial, Helvetica, clean, sans-serif;} >> >> pre, >> code { >> font:115% monospace;} >> >> * { >> } >> >> { >> padding-bottom:10px;} >> >> >> p a { >> } >> >> >> p span { >> color:#1E66AE;font-weight:700;} >> >> >> { >> color:#ff7900;font-weight:700;} >> >> { >> margin-bottom:20px;padding:0px;} >> >> >> li a { >> text-decoration:none;} >> >> >> li { >> list-style-type:square;padding:6px 0;} >> >> >> ul { >> } >> >> { >> } >> >> p { >> } >> >> tt { >> } >> >> ul li:last-child { >> border-right:none !important; >> } >> >> >> >> >> > > >

Mine looks like this. Goes on the outside on the stern. Now, if you don't have exhaust on the stern, won't work. A right angle elbow close to the transom with the exhaust hose then going straight up helps with following seas. Allen On Tue, Mar 21, 2017 at 5:03 PM, Duane Knize Boat kn… [at] san.rr.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > [Attachment(s) <#m_1002175506478810246_m_7570028809319396113_TopText> > from Duane Knize Boat included below] > > At a Caltopia several years ago, I met someone that had experienced > problems with large following seas back flooding the muffler on a Cal 2-39. > > This is in spite of the high loop in the exhaust, right up to the top > inside the aft coaming. > > His solution was a ping pong ball on a tether with which he plugged the > exhaust thru hull when seas were up. Starting the engine would blow the > plug out, hence the tether. > > I have considered adding a Centek exhaust check valve. > https://www.centekindustries.com/ > > > Regards, > Duane > > Duane Knize > S/V Marlyn > 1978 Cal 2-39 #18 > berthed: Emeryville, CA… [at] san.rr.com > > On 3/21/2017 7:16 AM, Allen Edwards al… [at] gmail.com [Cal_Boats] > wrote: > > > Someone makes an exhaust part that goes right at the transom that takes > the exhaust straight up from the outlet from the viewpoint of a wave. > Think of what a wave is going to see as it hits your transom. Is it going > to see a nice smooth curve and be able to flow uphill if it is strong > enough? Or is it going to see the wall of the pipe section after a right > angle bend. I think I put an elbow right there as I didn't have room for > the fancy part. My engine was getting flooded both by heeling enough to > put the entire exhaust under the water line, but also by following waves > when surfing into the GG. I also put a rubber flap on the exhaust that are > normally associated with power boats. I only had the flooding problem for > a year after Svendsen's replaced the original exhaust system. > > On Mon, Mar 20, 2017 at 8:31 PM, Donald C Dutton dn… [at] comcast.net > [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > >> >> >> I have read these concerns and recently checked my boat. The exhaust >> hose and the bilge pump are both routed well above waterline and then down >> to the outlets making it impossible for water to flow from the sea to the >> engine or the bilge. I have been in huge seas and motored in steep chop >> and have never had a problem with water entering the boat. >> >> Don Dutton >> 1986 Cal 33-2, “Quantum Evolution” >> >> >> On Mar 20, 2017, at 7:22 PM, Christopher Thompson ra… [at] yahoo.com >> [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: >> >> >> Claude, >> I believe that, regardless if under sail or power, a displacement hull >> will "squat" as it approaches hull speed. >> >> This is not a problem when motoring because sea water will not force its >> way upstream against exhaust pressure. It CAN be a problem when sailing and >> that is why the exhaust hose must be routed above the sailing waterline >> before it attaches to the engine. This issue can be compounded by a >> following sea. >> Chris 33-2 Damiana >> >> >> On Monday, March 20, 2017 5:24 PM, "Claude Roberts uw… [at] yahoo.com [Cal_Boats]" >> <Ca… [at] yahoogroups.com> wrote: >> >> >> >> I thought about prop pitch as a potential cause, but it also "squats" >> under sail only. >> >> -------------------------------------------- >> On Mon, 3/20/17, js… [at] gmail.com [Cal_Boats] < >> Ca… [at] yahoogroups.com> wrote: >> >> Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging >> To: Ca… [at] yahoogroups.com >> Date: Monday, March 20, 2017, 6:32 AM >> >> >> >> >> >> >> >> >> >> >> >> >> If you have an adjustable prop take a little of the >> pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love >> it. Whe I first installed it I had over pitched it a smidge >> though and while acceleration under power was great it >> buried the exhaust at 2200 rpm. Now perfectly pitched I am >> at hull speed, with a clear exhaust and incredible >> maneuvering agility. Love my Kiwi prop! >> >> With the exhaust buried you are dragging the >> transom through the water and motoring at a disadvantageous >> angle...slow and inefficient! >> Cheers,Jay >> >> >> >> >> >> >> >> >> >> -- >> { >> margin:10px >> 0;padding:0 10px;} >> >> hr { >> } >> >> { >> color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px >> 0;} >> >> { >> margin-bottom:10px;} >> >> .yiv3882473351ad { >> } >> >> .yiv3882473351ad p { >> } >> >> .yiv3882473351ad a { >> color:#0000ff;text-decoration:none;} >> >> { >> } >> >> >> { >> margin:10px >> 0px;font-weight:700;font-size:78%;line-height:122%;} >> >> >> .yiv3882473351ad { >> margin-bottom:10px;padding:0 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 >> .yiv3882473351underline { >> text-decoration:underline;} >> >> .yiv3882473351attach { >> clear:both;display:table;font-family:Arial;font-size:12px;padding:10px >> 0;width:400px;} >> >> .yiv3882473351attach div a { >> text-decoration:none;} >> >> .yiv3882473351attach img { >> padding-right:5px;} >> >> .yiv3882473351attach label { >> display:block;margin-bottom:5px;} >> >> .yiv3882473351attach label a { >> text-decoration:none;} >> >> blockquote { >> } >> >> .yiv3882473351bold { >> font-weight:700;} >> >> .yiv3882473351bold a { >> text-decoration:none;} >> >> dd.yiv3882473351last p a { >> font-weight:700;} >> >> dd.yiv3882473351last p span { >> margin-right:10px;font-family:Verdana;font-weight:700;} >> >> dd.yiv3882473351last p >> span.yiv3882473351yshortcuts { >> margin-right:0;} >> >> div.yiv3882473351attach-table div div a { >> text-decoration:none;} >> >> div.yiv3882473351attach-table { >> } >> >> div.yiv3882473351file-title a, >> div.yiv3882473351file-title a:active, >> div.yiv3882473351file-title a:hover, >> div.yiv3882473351file-title a:visited { >> text-decoration:none;} >> >> div.yiv3882473351photo-title a, >> div.yiv3882473351photo-title a:active, >> div.yiv3882473351photo-title a:hover, >> div.yiv3882473351photo-title a:visited { >> text-decoration:none;} >> >> div >> p a span.yiv3882473351yshortcuts { >> font-weight:normal;} >> >> .yiv3882473351green { >> color:#628c2a;} >> >> .yiv3882473351MsoNormal { >> } >> >> o { >> } >> >> 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:cent >> er;white-space:nowrap;width:64px;} >> >> { >> } >> >> { >> } >> >> .yiv3882473351replbq { >> } >> >> div a:first-child { >> margin-right:2px;padding-right:5px;} >> >> { >> font-family:Arial, helvetica, clean, >> sans-serif;} >> >> table { >> font:100%;} >> >> select, >> input, textarea { >> font:99% Arial, Helvetica, clean, sans-serif;} >> >> pre, >> code { >> font:115% monospace;} >> >> * { >> } >> >> { >> padding-bottom:10px;} >> >> >> p a { >> } >> >> >> p span { >> color:#1E66AE;font-weight:700;} >> >> >> { >> color:#ff7900;font-weight:700;} >> >> { >> margin-bottom:20px;padding:0px;} >> >> >> li a { >> text-decoration:none;} >> >> >> li { >> list-style-type:square;padding:6px 0;} >> >> >> ul { >> } >> >> { >> } >> >> p { >> } >> >> tt { >> } >> >> ul li:last-child { >> border-right:none !important; >> } >> >> >> >> >> >> >> > > >

Hmmm. While replacing my baby Yanmar, i also had to replace the exhaust line. Below, I see mention of a "loop" in the exhaust line. Mine has a "drop" after the miximg elbow, before going up and exiting the transom. Should it go up imstead of dropping after the mixing elbow? Thinking about it...not sure what makes most sense? What's correct? Thanks. ...tom > On Mar 21, 2017, at 7:07 PM, Allen Edwards al… [at] gmail.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: > > Mine looks like this. Goes on the outside on the stern. Now, if you don't have exhaust on the stern, won't work. A right angle elbow close to the transom with the exhaust hose then going straight up helps with following seas. > > Allen > > > > >> On Tue, Mar 21, 2017 at 5:03 PM, Duane Knize Boat kn… [at] san.rr.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: >> >> [Attachment(s) from Duane Knize Boat included below] >> At a Caltopia several years ago, I met someone that had experienced problems with large following seas back flooding the muffler on a Cal 2-39. >> >> This is in spite of the high loop in the exhaust, right up to the top inside the aft coaming. >> His solution was a ping pong ball on a tether with which he plugged the exhaust thru hull when seas were up. Starting the engine would blow the plug out, hence the tether. >> I have considered adding a Centek exhaust check valve. https://www.centekindustries.com/ >> >> >> <mjifeolijkcljjle.png> >> Regards, >> Duane >> Duane Knize >> S/V Marlyn >> 1978 Cal 2-39 #18 >> berthed: Emeryville, CA >> kn… [at] san.rr.com >>> On 3/21/2017 7:16 AM, Allen Edwards al… [at] gmail.com [Cal_Boats] wrote: >>> >>> Someone makes an exhaust part that goes right at the transom that takes the exhaust straight up from the outlet from the viewpoint of a wave. Think of what a wave is going to see as it hits your transom. Is it going to see a nice smooth curve and be able to flow uphill if it is strong enough? Or is it going to see the wall of the pipe section after a right angle bend. I think I put an elbow right there as I didn't have room for the fancy part. My engine was getting flooded both by heeling enough to put the entire exhaust under the water line, but also by following waves when surfing into the GG. I also put a rubber flap on the exhaust that are normally associated with power boats. I only had the flooding problem for a year after Svendsen's replaced the original exhaust system. >>> >>>> On Mon, Mar 20, 2017 at 8:31 PM, Donald C Dutton dn… [at] comcast.net [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: >>>> >>>> I have read these concerns and recently checked my boat. The exhaust hose and the bilge pump are both routed well above waterline and then down to the outlets making it impossible for water to flow from the sea to the engine or the bilge. I have been in huge seas and motored in steep chop and have never had a problem with water entering the boat. >>>> >>>> >>>> Don Dutton >>>> 1986 Cal 33-2, “Quantum Evolution” >>>> >>>> >>>>> On Mar 20, 2017, at 7:22 PM, Christopher Thompson ra… [at] yahoo.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: >>>>> >>>>> >>>>> Claude, >>>>> I believe that, regardless if under sail or power, a displacement hull will "squat" as it approaches hull speed. >>>>> >>>>> This is not a problem when motoring because sea water will not force its way upstream against exhaust pressure. It CAN be a problem when sailing and that is why the exhaust hose must be routed above the sailing waterline before it attaches to the engine. This issue can be compounded by a following sea. >>>>> Chris 33-2 Damiana >>>>> >>>>> >>>>> On Monday, March 20, 2017 5:24 PM, "Claude Roberts uw… [at] yahoo.com [Cal_Boats]" <Ca… [at] yahoogroups.com> wrote: >>>>> >>>>> >>>>> >>>>> I thought about prop pitch as a potential cause, but it also "squats" under sail only. >>>>> >>>>> -------------------------------------------- >>>>> On Mon, 3/20/17, js… [at] gmail.com [Cal_Boats] <Ca… [at] yahoogroups.com> wrote: >>>>> >>>>> Subject: [Cal_Boats] Re: Cal 33 - exhaust submerging >>>>> To: Ca… [at] yahoogroups.com >>>>> Date: Monday, March 20, 2017, 6:32 AM >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> If you have an adjustable prop take a little of the >>>>> pitch off. I have a Kiwi prop on my 1986 Cal 33-2 and I love >>>>> it. Whe I first installed it I had over pitched it a smidge >>>>> though and while acceleration under power was great it >>>>> buried the exhaust at 2200 rpm. Now perfectly pitched I am >>>>> at hull speed, with a clear exhaust and incredible >>>>> maneuvering agility. Love my Kiwi prop! >>>>> >>>>> With the exhaust buried you are dragging the >>>>> transom through the water and motoring at a disadvantageous >>>>> angle...slow and inefficient! >>>>> Cheers,Jay >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> { >>>>> margin:10px >>>>> 0;padding:0 10px;} >>>>> >>>>> hr { >>>>> } >>>>> >>>>> { >>>>> color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px >>>>> 0;} >>>>> >>>>> { >>>>> margin-bottom:10px;} >>>>> >>>>> .yiv3882473351ad { >>>>> } >>>>> >>>>> .yiv3882473351ad p { >>>>> } >>>>> >>>>> .yiv3882473351ad a { >>>>> color:#0000ff;text-decoration:none;} >>>>> >>>>> { >>>>> } >>>>> >>>>> >>>>> { >>>>> margin:10px >>>>> 0px;font-weight:700;font-size:78%;line-height:122%;} >>>>> >>>>> >>>>> .yiv3882473351ad { >>>>> margin-bottom:10px;padding:0 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 >>>>> .yiv3882473351underline { >>>>> text-decoration:underline;} >>>>> >>>>> .yiv3882473351attach { >>>>> clear:both;display:table;font-family:Arial;font-size:12px;padding:10px >>>>> 0;width:400px;} >>>>> >>>>> .yiv3882473351attach div a { >>>>> text-decoration:none;} >>>>> >>>>> .yiv3882473351attach img { >>>>> padding-right:5px;} >>>>> >>>>> .yiv3882473351attach label { >>>>> display:block;margin-bottom:5px;} >>>>> >>>>> .yiv3882473351attach label a { >>>>> text-decoration:none;} >>>>> >>>>> blockquote { >>>>> } >>>>> >>>>> .yiv3882473351bold { >>>>> font-weight:700;} >>>>> >>>>> .yiv3882473351bold a { >>>>> text-decoration:none;} >>>>> >>>>> dd.yiv3882473351last p a { >>>>> font-weight:700;} >>>>> >>>>> dd.yiv3882473351last p span { >>>>> margin-right:10px;font-family:Verdana;font-weight:700;} >>>>> >>>>> dd.yiv3882473351last p >>>>> span.yiv3882473351yshortcuts { >>>>> margin-right:0;} >>>>> >>>>> div.yiv3882473351attach-table div div a { >>>>> text-decoration:none;} >>>>> >>>>> div.yiv3882473351attach-table { >>>>> } >>>>> >>>>> div.yiv3882473351file-title a, >>>>> div.yiv3882473351file-title a:active, >>>>> div.yiv3882473351file-title a:hover, >>>>> div.yiv3882473351file-title a:visited { >>>>> text-decoration:none;} >>>>> >>>>> div.yiv3882473351photo-title a, >>>>> div.yiv3882473351photo-title a:active, >>>>> div.yiv3882473351photo-title a:hover, >>>>> div.yiv3882473351photo-title a:visited { >>>>> text-decoration:none;} >>>>> >>>>> div >>>>> p a span.yiv3882473351yshortcuts { >>>>> font-weight:normal;} >>>>> >>>>> .yiv3882473351green { >>>>> color:#628c2a;} >>>>> >>>>> .yiv3882473351MsoNormal { >>>>> } >>>>> >>>>> o { >>>>> } >>>>> >>>>> 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;} >>>>> >>>>> { >>>>> } >>>>> >>>>> { >>>>> } >>>>> >>>>> .yiv3882473351replbq { >>>>> } >>>>> >>>>> div a:first-child { >>>>> margin-right:2px;padding-right:5px;} >>>>> >>>>> { >>>>> font-family:Arial, helvetica, clean, >>>>> sans-serif;} >>>>> >>>>> table { >>>>> font:100%;} >>>>> >>>>> select, >>>>> input, textarea { >>>>> font:99% Arial, Helvetica, clean, sans-serif;} >>>>> >>>>> pre, >>>>> code { >>>>> font:115% monospace;} >>>>> >>>>> * { >>>>> } >>>>> >>>>> { >>>>> padding-bottom:10px;} >>>>> >>>>> >>>>> p a { >>>>> } >>>>> >>>>> >>>>> p span { >>>>> color:#1E66AE;font-weight:700;} >>>>> >>>>> >>>>> { >>>>> color:#ff7900;font-weight:700;} >>>>> >>>>> { >>>>> margin-bottom:20px;padding:0px;} >>>>> >>>>> >>>>> li a { >>>>> text-decoration:none;} >>>>> >>>>> >>>>> li { >>>>> list-style-type:square;padding:6px 0;} >>>>> >>>>> >>>>> ul { >>>>> } >>>>> >>>>> { >>>>> } >>>>> >>>>> p { >>>>> } >>>>> >>>>> tt { >>>>> } >>>>> >>>>> ul li:last-child { >>>>> border-right:none !important; >>>>> } >>>>> > >