Hello group!

I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet.

Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the resident mechanic who may be on holidays or delivery trip at this time of year. He will set you straight on the engine and prop requirements. Best of luck....happy sailing...keep the nose up...:) /ch On Mon, Jul 30, 2012 at 10:50 AM, JamesD <sh… [at] pacbell.net> wrote: > I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > > The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > > Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > > > > ------------------------------------ > > Yahoo! Groups Links > > > -- /ch

Here's what we need to get a prop recommendation - maximum engine hp at what? rpm transmission reduction ratio [ 2.05:1 in your case ] load waterline length of the boat maximum diameter prop that fits your boat *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184* On 7/30/2012 6:49 PM, chris123 wrote: > Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > resident mechanic who may be on holidays or delivery trip at this time > of year. He will set you straight on the engine and prop requirements. > > Best of luck....happy sailing...keep the nose up...:) > > /ch > > > On Mon, Jul 30, 2012 at 10:50 AM, JamesD<sh… [at] pacbell.net> wrote: >> I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >> >> The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >> >> Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >> >> >> >> ------------------------------------ >> >> Yahoo! Groups Links >> >> >> > > -- *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184*

Right thanks. I am having a diver measure the clearance sometime this week. Max RPM is 3600 20hp. LWL 22' 1" I read that the max prop diameter is 12", but I've also read that there were different setups. So when the driver pulls the prop, he'll check the clearance. It had an A4.... On Jul 30, 2012, at 5:34 PM, Joe DeMers <je… [at] mindspring.com> wrote: > Here's what we need to get a prop recommendation - > > maximum engine hp at what? rpm > > transmission reduction ratio [ 2.05:1 in your case ] > > load waterline length of the boat > > maximum diameter prop that fits your boat > Joe DeMers - owner > > Sound Marine Diesel LLC > > SoundMarineDiesel.com > phone & fax (860) 666-2184 > > > On 7/30/2012 6:49 PM, chris123 wrote: >> >> Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >> resident mechanic who may be on holidays or delivery trip at this time >> of year. He will set you straight on the engine and prop requirements. >> >> Best of luck....happy sailing...keep the nose up...:) >> >> /ch >> >> >> On Mon, Jul 30, 2012 at 10:50 AM, JamesD <sh… [at] pacbell.net> wrote: >>> I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >>> >>> The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >>> >>> Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >>> >>> >>> >>> ------------------------------------ >>> >>> Yahoo! Groups Links >>> >>> >>> >> >> > > -- > Joe DeMers - owner > > Sound Marine Diesel LLC > > SoundMarineDiesel.com > phone & fax (860) 666-2184 > >

Your engine is a Universal M20 3B, 20hp @ 3600 rpm. [ way too much power for your Cal, 14 hp is ideal ] trans ratio is 2.05:1 LWL is 22' 1" [ double check this figure ] 12 x 11, 3 blade [ we suggest a 2 blade for your sweet sailing Cal ] 12 x 13, 2 blade [ very oddball size ] 14 x 11 , 2 blade [ ideal ] *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184* On 7/30/2012 8:58 PM, Jim Donohue wrote: > > > Right thanks. I am having a diver measure the clearance sometime this > week. Max RPM is 3600 20hp. LWL 22' 1" I read that the max prop > diameter is 12", but I've also read that there were different setups. > So when the driver pulls the prop, he'll check the clearance. It had > an A4.... > > > > On Jul 30, 2012, at 5:34 PM, Joe DeMers <je… [at] mindspring.com > <mailto:je… [at] mindspring.com>> wrote: > >> Here's what we need to get a prop recommendation - >> >> maximum engine hp at what? rpm >> >> transmission reduction ratio [ 2.05:1 in your case ] >> >> load waterline length of the boat >> >> maximum diameter prop that fits your boat >> >> *Joe DeMers - owner* >> >> Sound Marine Diesel LLC >> >> SoundMarineDiesel.com <http://www.soundmarinediesel.com/> >> >> *phone & fax (860) 666-2184* >> >> >> On 7/30/2012 6:49 PM, chris123 wrote: >>> Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >>> resident mechanic who may be on holidays or delivery trip at this time >>> of year. He will set you straight on the engine and prop requirements. >>> >>> Best of luck....happy sailing...keep the nose up...:) >>> >>> /ch >>> >>> >>> On Mon, Jul 30, 2012 at 10:50 AM, JamesD<sh… [at] pacbell.net> wrote: >>>> I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >>>> >>>> The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >>>> >>>> Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >>>> >>>> >>>> >>>> ------------------------------------ >>>> >>>> Yahoo! Groups Links >>>> >>>> >>>> >> >> -- >> >> *Joe DeMers - owner* >> >> Sound Marine Diesel LLC >> >> SoundMarineDiesel.com <http://www.soundmarinediesel.com/> >> >> *phone & fax (860) 666-2184* >> > > > > > No virus found in this message. > Checked by AVG - www.avg.com <http://www.avg.com> > Version: 2012.0.2197 / Virus Database: 2437/5166 - Release Date: 07/30/12 > -- *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184*

Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? I also read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. Bummed out - Dyer From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers Sent: Monday, July 30, 2012 5:35 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] Hello group! and prop recommendation Here's what we need to get a prop recommendation - maximum engine hp at what? rpm transmission reduction ratio [ 2.05:1 in your case ] load waterline length of the boat maximum diameter prop that fits your boat Joe DeMers - owner Sound Marine Diesel LLC SoundMarineDiesel.com phone & fax (860) 666-2184 On 7/30/2012 6:49 PM, chris123 wrote: Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the resident mechanic who may be on holidays or delivery trip at this time of year. He will set you straight on the engine and prop requirements. Best of luck....happy sailing...keep the nose up...:) /ch On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:sh… [at] pacbell.net wrote: I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > >The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > >Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > > > >------------------------------------ > >Yahoo! Groups Links > > > -- Joe DeMers - owner Sound Marine Diesel LLC SoundMarineDiesel.com phone & fax (860) 666-2184 PG&E is committed to protecting our customers' privacy. To learn more, please visit http://www.pge.com/about/company/privacy/customer/

A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. Best regards /ch On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dy… [at] yahoo.com>wrote: > > > > Hey Joe, I understand diameter & number of blades are factors as well. I > am asking rather than stating as you (and others on this list) know more > than I about this. > > I read that a prop blade (radius) should ideally be 85% of the distance of > the center of the prop to the hull. A simple example would be: A boat with > 10 inches from prop center to hull would ideally have a 8.5inch blade or > radius which in turn be a 17inch diameter. Is that only for cetain types of > props? > > I also read that aside from less drag when sailing, 2 blades are more > efficient than 3. Might have been a sales pitch, but I don't know enough > about the subject & still doing some reading. > > I am doing homework on this stuff right now because in addition to my > rudder damage I posted about recently, I have prop & strut damage as well. > Honu is high ans dry at SF Boatworks where we found more damage than I > originally thought. > > Bummed out - > Dyer > > > *From:* Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] *On > Behalf Of *Joe DeMers > *Sent:* Monday, July 30, 2012 5:35 PM > *To:* Ca… [at] yahoogroups.com > *Subject:* Re: [Cal_Boats] Hello group! and prop recommendation > > > Here's what we need to get a prop recommendation - > > maximum engine hp at what? rpm > > transmission reduction ratio [ 2.05:1 in your case ] > > load waterline length of the boat > > maximum diameter prop that fits your boat > *Joe DeMers - owner* > Sound Marine Diesel LLC > SoundMarineDiesel.com <http://www.soundmarinediesel.com/> > *phone & fax (860) 666-2184* > > On 7/30/2012 6:49 PM, chris123 wrote: > > Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > > resident mechanic who may be on holidays or delivery trip at this time > > of year. He will set you straight on the engine and prop requirements. > > > > Best of luck....happy sailing...keep the nose up...:) > > > > /ch > > > > > > On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:sh… [at] pacbell.net <sh… [at] pacbell.net> wrote: > > I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > > > > The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > > > > Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > -- > *Joe DeMers - owner* > Sound Marine Diesel LLC > SoundMarineDiesel.com <http://www.soundmarinediesel.com/> > *phone & fax (860) 666-2184* > > PG&E is committed to protecting our customers' privacy. > To learn more, please visit > http://www.pge.com/about/company/privacy/customer/ > > > > > > -- /ch

I would respectfully offer an alternate opinion. A two bladed (geared is better) folding prop of modern design does not suffer in reverse or forward and a 1/2 to 1 full knot of boat speed on a sailboat Is something to cling to whether you race or are just running from a storm or want to beat your friends to the best anchor drop zone. I must concede that, unfortunately, the real disadvantage is the initial cost.... Wilkie On Jul 31, 2012, at 8:03 AM, chris123 <ch… [at] gmail.com> wrote: > > > A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. > > Best regards > > /ch > > > On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dy… [at] yahoo.com> wrote: > > > > Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. > > I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? > > I also read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. > > I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. > > Bummed out - > Dyer > > > From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers > Sent: Monday, July 30, 2012 5:35 PM > To: Ca… [at] yahoogroups.com > Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > Here's what we need to get a prop recommendation - > > maximum engine hp at what? rpm > > transmission reduction ratio [ 2.05:1 in your case ] > > load waterline length of the boat > > maximum diameter prop that fits your boat > Joe DeMers - owner > Sound Marine Diesel LLC > SoundMarineDiesel.com > phone & fax (860) 666-2184 > > On 7/30/2012 6:49 PM, chris123 wrote: > Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > resident mechanic who may be on holidays or delivery trip at this time > of year. He will set you straight on the engine and prop requirements. > > Best of luck....happy sailing...keep the nose up...:) > > /ch > > > On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:sh… [at] pacbell.net wrote: > I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > > The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > > Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > > > > ------------------------------------ > > Yahoo! Groups Links > > > > > > > > -- > Joe DeMers - owner > Sound Marine Diesel LLC > SoundMarineDiesel.com > phone & fax (860) 666-2184 > > PG&E is committed to protecting our customers' privacy. > To learn more, please visit http://www.pge.com/about/company/privacy/customer/ > > > > > > > > -- > /ch > > > > >

If anyone wants an old 2 blade 14-7 contact me off list. I don't know what it is worth so make an offer after you see some photos and more details. I just replaced mine with a 14-10. Allen On Tue, Jul 31, 2012 at 9:56 AM, David Owen <dw… [at] me.com> wrote: > ** > > > I would respectfully offer an alternate opinion. A two bladed (geared is > better) folding prop of modern design does not suffer in reverse or forward > and a 1/2 to 1 full knot of boat speed on a sailboat Is something to cling > to whether you race or are just running from a storm or want to beat your > friends to the best anchor drop zone. > > I must concede that, unfortunately, the real disadvantage is the initial > cost.... > > Wilkie > > Sent from my iPad > > On Jul 31, 2012, at 8:03 AM, chris123 <ch… [at] gmail.com> wrote: > > A comment if I may. If you are racing a 2 blade is an issue. If not a > three blade is the way to go. Less work on the engine, easier to backup. > Drag loss is incremental, whats a knot on a weekend or longer passage? in > exchange of using less fuel consumption and much more comfort working a > slip in a high wind. I'd take a three blade over a 2 blade anytime.....but > then again I dont race and dont suspect I will other then crew on other > peoples boats. Now that could be fun and a good experience. > > Best regards > > /ch > > > On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dy… [at] yahoo.com>wrote: > >> >> >> >> Hey Joe, I understand diameter & number of blades are factors as well. I >> am asking rather than stating as you (and others on this list) know more >> than I about this. >> >> I read that a prop blade (radius) should ideally be 85% of the distance >> of the center of the prop to the hull. A simple example would be: A boat >> with 10 inches from prop center to hull would ideally have a 8.5inch blade >> or radius which in turn be a 17inch diameter. Is that only for cetain types >> of props? >> >> I also read that aside from less drag when sailing, 2 blades are more >> efficient than 3. Might have been a sales pitch, but I don't know enough >> about the subject & still doing some reading. >> >> I am doing homework on this stuff right now because in addition to my >> rudder damage I posted about recently, I have prop & strut damage as well. >> Honu is high ans dry at SF Boatworks where we found more damage than I >> originally thought. >> >> Bummed out - >> Dyer >> >> >> *From:* Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] *On >> Behalf Of *Joe DeMers >> *Sent:* Monday, July 30, 2012 5:35 PM >> *To:* Ca… [at] yahoogroups.com >> *Subject:* Re: [Cal_Boats] Hello group! and prop recommendation >> >> >> Here's what we need to get a prop recommendation - >> >> maximum engine hp at what? rpm >> >> transmission reduction ratio [ 2.05:1 in your case ] >> >> load waterline length of the boat >> >> maximum diameter prop that fits your boat >> *Joe DeMers - owner* >> Sound Marine Diesel LLC >> SoundMarineDiesel.com <http://www.soundmarinediesel.com/> >> *phone & fax (860) 666-2184* >> >> On 7/30/2012 6:49 PM, chris123 wrote: >> >> Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >> >> resident mechanic who may be on holidays or delivery trip at this time >> >> of year. He will set you straight on the engine and prop requirements. >> >> >> >> Best of luck....happy sailing...keep the nose up...:) >> >> >> >> /ch >> >> >> >> >> >> On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:sh… [at] pacbell.net <sh… [at] pacbell.net> wrote: >> >> I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >> >> >> >> The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >> >> >> >> Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >> >> >> >> >> >> >> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> -- >> *Joe DeMers - owner* >> Sound Marine Diesel LLC >> SoundMarineDiesel.com <http://www.soundmarinediesel.com/> >> *phone & fax (860) 666-2184* >> >> PG&E is committed to protecting our customers' privacy. >> To learn more, please visit >> http://www.pge.com/about/company/privacy/customer/ >> >> >> >> >> > > > -- > /ch > > > >

I have no idea why the PO installed that engine. It's there, it is lighter than than the A4 and it works. So installed it shall be until it blows up. I have a diver coming this week to measure clearances and pull the prop. Thanks for the imput. On Jul 31, 2012, at 6:27 AM, Joe DeMers <je… [at] mindspring.com> wrote: > Your engine is a Universal M20 3B, 20hp @ 3600 rpm. [ way too much power for your Cal, 14 hp is ideal ] > > trans ratio is 2.05:1 > > LWL is 22' 1" [ double check this figure ] > > 12 x 11, 3 blade [ we suggest a 2 blade for your sweet sailing Cal ] > > 12 x 13, 2 blade [ very oddball size ] > > 14 x 11 , 2 blade [ ideal ] > Joe DeMers - owner > > Sound Marine Diesel LLC > > SoundMarineDiesel.com > phone & fax (860) 666-2184 > > > On 7/30/2012 8:58 PM, Jim Donohue wrote: >> >> Right thanks. I am having a diver measure the clearance sometime this week. Max RPM is 3600 20hp. LWL 22' 1" I read that the max prop diameter is 12", but I've also read that there were different setups. So when the driver pulls the prop, he'll check the clearance. It had an A4.... >> >> >> >> On Jul 30, 2012, at 5:34 PM, Joe DeMers <je… [at] mindspring.com> wrote: >> >>> >>> Here's what we need to get a prop recommendation - >>> >>> maximum engine hp at what? rpm >>> >>> transmission reduction ratio [ 2.05:1 in your case ] >>> >>> load waterline length of the boat >>> >>> maximum diameter prop that fits your boat >>> Joe DeMers - owner >>> >>> Sound Marine Diesel LLC >>> >>> SoundMarineDiesel.com >>> phone & fax (860) 666-2184 >>> >>> >>> On 7/30/2012 6:49 PM, chris123 wrote: >>>> >>>> Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >>>> resident mechanic who may be on holidays or delivery trip at this time >>>> of year. He will set you straight on the engine and prop requirements. >>>> >>>> Best of luck....happy sailing...keep the nose up...:) >>>> >>>> /ch >>>> >>>> >>>> On Mon, Jul 30, 2012 at 10:50 AM, JamesD <sh… [at] pacbell.net> wrote: >>>>> I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >>>>> >>>>> The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >>>>> >>>>> Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >>>>> >>>>> >>>>> >>>>> ------------------------------------ >>>>> >>>>> Yahoo! Groups Links >>>>> >>>>> >>>>> >>> >>> -- >>> Joe DeMers - owner >>> >>> Sound Marine Diesel LLC >>> >>> SoundMarineDiesel.com >>> phone & fax (860) 666-2184 >>> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2197 / Virus Database: 2437/5166 - Release Date: 07/30/12 >> > > -- > Joe DeMers - owner > > Sound Marine Diesel LLC > > SoundMarineDiesel.com > phone & fax (860) 666-2184 > >

I use a 2-blade 13" Maxprop on my Cal 2-27, set at 18 degrees, powered by a BetaMarine BZ482 (13.5 hp).

A proper 2 blade will drive your boat well. It can be tucked behind the keel. A 3 blade will always be a drag! Are you a sailor or a motorboatman? My Best, Mike Farrell SC27 USA 57313 From: chris123 <ch… [at] gmail.com> To: Ca… [at] yahoogroups.com Sent: Tuesday, July 31, 2012 8:03 AM Subject: Re: [Cal_Boats] Hello group! and prop recommendation A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. Best regards /ch On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dy… [at] yahoo.com> wrote: > > > > >Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. > >I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? > >I also read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. > >I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. > >Bummed out - > Dyer > > >From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers >Sent: Monday, July 30, 2012 5:35 PM >To: Ca… [at] yahoogroups.com >Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > >Here's what we need to get a prop recommendation - > >maximum engine hp at what? rpm > >transmission reduction ratio [ 2.05:1 in your case ] > >load waterline length of the boat > >maximum diameter prop that fits your boat >Joe DeMers - owner >Sound Marine Diesel LLC >SoundMarineDiesel.com >phone & fax (860) 666-2184 > >On 7/30/2012 6:49 PM, chris123 wrote: >Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >resident mechanic who may be on holidays or delivery trip at this time >of year. He will set you straight on the engine and prop requirements. > >Best of luck....happy sailing...keep the nose up...:) > >/ch > > >On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:sh… [at] pacbell.net wrote: >I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >> >>The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >> >>Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >> >> >> >>------------------------------------ >> >>Yahoo! Groups Links >> >> >> > > > > >-- >Joe DeMers - owner >Sound Marine Diesel LLC >SoundMarineDiesel.com >phone & fax (860) 666-2184 > >PG&E is committed to protecting our customers' privacy. >To learn more, please visit http://www.pge.com/about/company/privacy/customer/ > > > > -- /ch

Greets Wilkie A compromise....Kiwi feathering prop....:) ?? Best regards /ch On Tue, Jul 31, 2012 at 12:56 PM, David Owen <dw… [at] me.com> wrote: > > > I would respectfully offer an alternate opinion. >

Chris, I checked out the Kiwi after seeing one on a large blue water boat in Ventura Harbor Boat Yard for repairs (not prop repairs.) The guy loved it. Unfortunately, they don't make a model (at least not a year and a half ago) that will fit on the 2-29, and so I think that rules out other Cals of similar or smaller size. Wilkie On Jul 31, 2012, at 9:26 PM, chris123 <ch… [at] gmail.com> wrote: Greets Wilkie A compromise....Kiwi feathering prop....:) ?? Best regards /ch On Tue, Jul 31, 2012 at 12:56 PM, David Owen <dw… [at] me.com> wrote: I would respectfully offer an alternate opinion.

Wilkie, The answer I got about the Kiwi was that it wouldn't work with the direct drive Atomic 4. David Dobbs, CAL 29 411 From: David Owen <dw… [at] me.com> To: Ca… [at] yahoogroups.com Sent: Wednesday, August 1, 2012 1:38 AM Subject: Re: [Cal_Boats] Hello group! and prop recommendation Chris, I checked out the Kiwi after seeing one on a large blue water boat in Ventura Harbor Boat Yard for repairs (not prop repairs.) The guy loved it. Unfortunately, they don't make a model (at least not a year and a half ago) that will fit on the 2-29, and so I think that rules out other Cals of similar or smaller size. Wilkie On Jul 31, 2012, at 9:26 PM, chris123 <ch… [at] gmail.com> wrote: Greets Wilkie A compromise....Kiwi feathering prop....:) ?? Best regards /ch On Tue, Jul 31, 2012 at 12:56 PM, David Owen <dw… [at] me.com> wrote: > > >I would respectfully offer an alternate opinion. >

Finally had the prop pulled today. It looks like 12" is the biggest I can go unless I get a longer prop shaft and wiggle a thirteen in there. The prop pulled is a 1" shaft 12X6 bronze 2 blade (Michigan Wheel Sailor). Anyone interested? I'm thinking a folding/feathering prop is in order....It's just money right? --- In Ca… [at] yahoogroups.com, mike farrell <vectormenow@...> wrote: > > A proper 2 blade will drive your boat well. It can be tucked behind the keel. A 3 blade will always be a drag! Are you a sailor or a motorboatman? > My Best, Mike Farrell SC27 USA 57313 > > > ________________________________ > From: chris123 <chris.herrnberger@...> > To: Ca… [at] yahoogroups.com > Sent: Tuesday, July 31, 2012 8:03 AM > Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. > > Best regards > > /ch > > > > On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dylancrouch@...> wrote: > > > > > > > > > > > >Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. > > > >I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? > > > >I also read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. > > > >I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. > > > >Bummed out - > > Dyer > > > > > >From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers > >Sent: Monday, July 30, 2012 5:35 PM > >To: Ca… [at] yahoogroups.com > >Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > >Here's what we need to get a prop recommendation - > > > >maximum engine hp at what? rpm > > > >transmission reduction ratio [ 2.05:1 in your case ] > > > >load waterline length of the boat > > > >maximum diameter prop that fits your boat > >Joe DeMers - owner > >Sound Marine Diesel LLC > >SoundMarineDiesel.com > >phone & fax (860) 666-2184 > > > >On 7/30/2012 6:49 PM, chris123 wrote: > >Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > >resident mechanic who may be on holidays or delivery trip at this time > >of year. He will set you straight on the engine and prop requirements. > > > >Best of luck....happy sailing...keep the nose up...:) > > > >/ch > > > > > >On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:shoerjim@... wrote: > >I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > >> > >>The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > >> > >>Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > >> > >> > >> > >>------------------------------------ > >> > >>Yahoo! Groups Links > >> > >> > >> > > > > > > > > > >-- > >Joe DeMers - owner > >Sound Marine Diesel LLC > >SoundMarineDiesel.com > >phone & fax (860) 666-2184 > > > >PG&E is committed to protecting our customers' privacy. > >To learn more, please visit http://www.pge.com/about/company/privacy/customer/ > > > > > > > > > > > -- > /ch >

Did you get a measurement from the end of the shaft to the rudder? A folding prop has a long base that the blades attach to effectively extending the shaft several inches (a fixed prop is installed before the end of the shaft, a folding prop is installed after the end of the shaft . if that makes sense) on my 227 I could only get a 10" folding prop on after I modified the cutlass, shaft, and rudder. That being said I know that some of the older 227's that were equipped with a4's installed folding props with no problems. Before I modified everything I had a 14" fixed prop. John B CAL 227 #650 From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of JamesD Sent: Tuesday, August 14, 2012 10:53 PM To: Ca… [at] yahoogroups.com Subject: [Cal_Boats] Re: Hello group! and prop recommendation Finally had the prop pulled today. It looks like 12" is the biggest I can go unless I get a longer prop shaft and wiggle a thirteen in there. The prop pulled is a 1" shaft 12X6 bronze 2 blade (Michigan Wheel Sailor). Anyone interested? I'm thinking a folding/feathering prop is in order....It's just money right? --- In Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> , mike farrell <vectormenow@...> wrote: > > A proper 2 blade will drive your boat well. It can be tucked behind the keel. A 3 blade will always be a drag! Are you a sailor or a motorboatman? > My Best, Mike Farrell SC27 USA 57313 > > > ________________________________ > From: chris123 <chris.herrnberger@...> > To: Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, July 31, 2012 8:03 AM > Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. > > Best regards > > /ch > > > > On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dylancrouch@...> wrote: > > > > > > > > > > > >Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. > > > >I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? > > > >I also read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. > > > >I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. > > > >Bummed out - > > Dyer > > > > > >From:Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> [mailto:Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> ] On Behalf Of Joe DeMers > >Sent: Monday, July 30, 2012 5:35 PM > >To: Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> > >Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > >Here's what we need to get a prop recommendation - > > > >maximum engine hp at what? rpm > > > >transmission reduction ratio [ 2.05:1 in your case ] > > > >load waterline length of the boat > > > >maximum diameter prop that fits your boat > >Joe DeMers - owner > >Sound Marine Diesel LLC > >SoundMarineDiesel.com > >phone & fax (860) 666-2184 > > > >On 7/30/2012 6:49 PM, chris123 wrote: > >Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > >resident mechanic who may be on holidays or delivery trip at this time > >of year. He will set you straight on the engine and prop requirements. > > > >Best of luck....happy sailing...keep the nose up...:) > > > >/ch > > > > > >On Mon, Jul 30, 2012 at 10:50 AM, JamesD mailto:shoerjim@... wrote: > >I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > >> > >>The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > >> > >>Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > >> > >> > >> > >>------------------------------------ > >> > >>Yahoo! Groups Links > >> > >> > >> > > > > > > > > > >-- > >Joe DeMers - owner > >Sound Marine Diesel LLC > >SoundMarineDiesel.com > >phone & fax (860) 666-2184 > > > >PG&E is committed to protecting our customers' privacy. > >To learn more, please visit http://www.pge.com/about/company/privacy/customer/ > > > > > > > > > > > -- > /ch >

I have 9" clearance from the end of the shaft to the rudder. The boat was made in '78. Disco lives! On Aug 15, 2012, at 6:24 AM, "John Boyce" <je… [at] gmail.com> wrote: > Did you get a measurement from the end of the shaft to the rudder? A folding prop has a long base that the blades attach to effectively extending the shaft several inches (a fixed prop is installed before the end of the shaft, a folding prop is installed after the end of the shaft … if that makes sense) on my 227 I could only get a 10” folding prop on after I modified the cutlass, shaft, and rudder. That being said I know that some of the older 227’s that were equipped with a4’s installed folding props with no problems. Before I modified everything I had a 14” fixed prop. > > > > John B > > CAL 227 #650 > > > > From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of JamesD > Sent: Tuesday, August 14, 2012 10:53 PM > To: Ca… [at] yahoogroups.com > Subject: [Cal_Boats] Re: Hello group! and prop recommendation > > > > > > Finally had the prop pulled today. It looks like 12" is the biggest I can go unless I get a longer prop shaft and wiggle a thirteen in there. The prop pulled is a 1" shaft 12X6 bronze 2 blade (Michigan Wheel Sailor). Anyone interested? > > I'm thinking a folding/feathering prop is in order....It's just money right? > > --- In Ca… [at] yahoogroups.com, mike farrell <vectormenow@...> wrote: > > > > A proper 2 blade will drive your boat well. It can be tucked behind the keel. A 3 blade will always be a drag! Are you a sailor or a motorboatman? > > My Best, Mike Farrell SC27 USA 57313 > > > > > > ________________________________ > > From: chris123 <chris.herrnberger@...> > > To: Ca… [at] yahoogroups.com > > Sent: Tuesday, July 31, 2012 8:03 AM > > Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > > > > > > A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. > > > > Best regards > > > > /ch > > > > > > > > On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dylancrouch@...> wrote: > > > > > > > > > > > > > > > > > > >Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. > > > > > >I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? > > > > > >I also ! read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. > > > > > >I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. > > > > > >Bummed out - > > > Dyer > > > > > > > > >From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers > > >Sent: Monday, July 30, 2012 5:35 PM > > >To: Ca… [at] yahoogroups.com > > >Subject: Re: [Cal_Boats] Hello group! and prop recommendation > > > > > > > > >Here's what we need to get a prop recommendation - > > > > > >maximum engine hp at what? rpm > > > > > >transmission reduction ratio [ 2.05:1 in your case ] > > > > > >load waterline length of the boat > > > > > >maximum diameter prop that fits your boat > > >Joe DeMers - owner > > >Sound Marine Diesel LLC > > >SoundMarineDiesel.com > > >phone & fax (860) 666-2184 > > > > > >On 7/30/2012 6:49 PM, chris123 wrote: > > >Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the > > >resident mechanic who may be on holidays or delivery trip at this time > > >of year. He will set you straight on the engine and prop requirements. > > > > > >Best of luck....happy sailing...keep the nose up...:) > > > > > >/ch > > > > > > > > >On Mon, Jul 30, 2012 at 10:50 AM, JamesD mail! to:shoerjim@... wrote: > > >I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. > > >> > > >>The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. > > >> > > >>Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. > > >> > > >> > > >> > > >>------------------------------------ > > >> > > >>Yahoo! Groups Links > > >> > > >> > > >> > > > > > > > > > > > > > > >-- > > >Joe DeMers - owner > > >Sound Marine Diesel LLC > > >SoundMarineDiesel.com > > >phone & fax (860) 666-2184 > > > > > >PG&E is committed to protecting our customers' privacy. > > >To learn more, please visit http://www.pge.com/about/company/privacy/customer/ > > > > > > > > > > > > > > > > > > -- > > /ch > > > > >

Jim, We have a 2-Blade 13" MaxProp on our 1979 CAL 2-27, but I know there are lots of choices available on the market. If you are strictly a racer, I would definitely go for a folding prop, but be prepared to rubber-band the blades prior to each race. In our case, we cruise/race. The MaxProp easily drives the boat to hull-speed, and we have good maneuverability in reverse. While racing, we merely put the transmission in reverse to prevent the shaft from turning, and the blades feather for minimal drag. MaxProps are a bit pricey, but we were fortunate to get it with Magic when we bought her. Good Luck! From: Jim Donohue <sh… [at] pacbell.net> To: "Ca… [at] yahoogroups.com" <Ca… [at] yahoogroups.com> Sent: Wednesday, August 15, 2012 9:54 AM Subject: Re: [Cal_Boats] Re: Hello group! and prop recommendation I have 9" clearance from the end of the shaft to the rudder. The boat was made in '78. Disco lives! On Aug 15, 2012, at 6:24 AM, "John Boyce" <je… [at] gmail.com> wrote: >Did you get a measurement from the end of the shaft to the rudder? A folding prop has a long base that the blades attach to effectively extending the shaft several inches (a fixed prop is installed before the end of the shaft, a folding prop is installed after the end of the shaft … if that makes sense) on my 227 I could only get a 10” folding prop on after I modified the cutlass, shaft, and rudder. That being said I know that some of the older 227’s that were equipped with a4’s installed folding props with no problems. Before I modified everything I had a 14” fixed prop. > >John B >CAL 227 #650 > >From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of JamesD >Sent: Tuesday, August 14, 2012 10:53 PM >To: Ca… [at] yahoogroups.com >Subject: [Cal_Boats] Re: Hello group! and prop recommendation > > >Finally had the prop pulled today. It looks like 12" is the biggest I can go unless I get a longer prop shaft and wiggle a thirteen in there. The prop pulled is a 1" shaft 12X6 bronze 2 blade (Michigan Wheel Sailor). Anyone interested? > >I'm thinking a folding/feathering prop is in order....It's just money right? > >--- In Ca… [at] yahoogroups.com, mike farrell <vectormenow@...> wrote: >> >> A proper 2 blade will drive your boat well. It can be tucked behind the keel. A 3 blade will always be a drag! Are you a sailor or a motorboatman? >> My Best, Mike Farrell SC27 USA 57313 >> >> >> ________________________________ >> From: chris123 <chris.herrnberger@...> >> To: Ca… [at] yahoogroups.com >> Sent: Tuesday, July 31, 2012 8:03 AM >> Subject: Re: [Cal_Boats] Hello group! and prop recommendation >> >> >> >> >> A comment if I may. If you are racing a 2 blade is an issue. If not a three blade is the way to go. Less work on the engine, easier to backup. Drag loss is incremental, whats a knot on a weekend or longer passage? in exchange of using less fuel consumption and much more comfort working a slip in a high wind. I'd take a three blade over a 2 blade anytime.....but then again I dont race and dont suspect I will other then crew on other peoples boats. Now that could be fun and a good experience. >> >> Best regards >> >> /ch >> >> >> >> On Tue, Jul 31, 2012 at 10:25 AM, Dylan Crouch <dylancrouch@...> wrote: >> >> >> > >> > >> > >> > >> >Hey Joe, I understand diameter & number of blades are factors as well. I am asking rather than stating as you (and others on this list) know more than I about this. >> > >> >I read that a prop blade (radius) should ideally be 85% of the distance of the center of the prop to the hull. A simple example would be: A boat with 10 inches from prop center to hull would ideally have a 8.5inch blade or radius which in turn be a 17inch diameter. Is that only for cetain types of props? >> > >> >I also ! read that aside from less drag when sailing, 2 blades are more efficient than 3. Might have been a sales pitch, but I don't know enough about the subject & still doing some reading. >> > >> >I am doing homework on this stuff right now because in addition to my rudder damage I posted about recently, I have prop & strut damage as well. Honu is high ans dry at SF Boatworks where we found more damage than I originally thought. >> > >> >Bummed out - >> > Dyer >> > >> > >> >From:Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Joe DeMers >> >Sent: Monday, July 30, 2012 5:35 PM >> >To: Ca… [at] yahoogroups.com >> >Subject: Re: [Cal_Boats] Hello group! and prop recommendation >> > >> > >> >Here's what we need to get a prop recommendation - >> > >> >maximum engine hp at what? rpm >> > >> >transmission reduction ratio [ 2.05:1 in your case ] >> > >> >load waterline length of the boat >> > >> >maximum diameter prop that fits your boat >> >Joe DeMers - owner >> >Sound Marine Diesel LLC >> >SoundMarineDiesel.com >> >phone & fax (860) 666-2184 >> > >> >On 7/30/2012 6:49 PM, chris123 wrote: >> >Greets...and welcome, the 27 is a nice boat.. Ping Joe Demers the >> >resident mechanic who may be on holidays or delivery trip at this time >> >of year. He will set you straight on the engine and prop requirements. >> > >> >Best of luck....happy sailing...keep the nose up...:) >> > >> >/ch >> > >> > >> >On Mon, Jul 30, 2012 at 10:50 AM, JamesD mail! to:shoerjim@... wrote: >> >I just purchased 1978 Cal 2-27 "September Too", in Half Moon Bay, California. I just moved her to Marina Bay Yacht Harbor, Richmond, California, where she will be berthed for the foreseeable future. >> >> >> >>The boat was re powered with a Universal M20-3B (overkill?)diesel but I don't think the prop was changed to match; ~3.5-4K at cruising (3K) RPMs Anyone else have the same or similar engine? I think the Beta Marine is the same block (3cylinder 20 hp tractor engine) with a slightly different "marine" layout and is a common replacement for the Atomic 4. The gear reduction is 2.05:1. >> >> >> >>Anyhow, just wanted to say hello to the group and pick the collective brain on prop sizes with the 20hp diesel. I have inquiries out to a few different prop sources but have not heard back yet. >> >> >> >> >> >> >> >>------------------------------------ >> >> >> >>Yahoo! Groups Links >> >> >> >> >> >> >> > >> > >> > >> > >> >-- >> >Joe DeMers - owner >> >Sound Marine Diesel LLC >> >SoundMarineDiesel.com >> >phone & fax (860) 666-2184 >> > >> >PG&E is committed to protecting our customers' privacy. >> >To learn more, please visit http://www.pge.com/about/company/privacy/customer/ >> > >> > >> > >> > >> >> >> -- >> /ch >>