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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 250 Specific Forum
 C250 With Yanmar Diesel Sail-drive
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JB
1st Mate

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USA
92 Posts

Initially Posted - 09/22/2022 :  10:53:30  Show Profile  Reply with Quote
Anyone with a sail-drive, have you replaced the diaphragm? Did you do it yourself or pay to have it done? How much did you pay? Job seems doable with help but parts are expensive, labor even more so.

1988 C25 Wing Keel Std Rig Tohatsu 9.9 Tiller Steering and 2003 C250 Wing Keel Std Rig Inboard Diesel Wheel Steering

Edited by - JB on 09/27/2022 05:55:30

Voyager
Master Marine Consultant

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USA
5045 Posts

Response Posted - 09/24/2022 :  18:38:37  Show Profile  Reply with Quote
Hmmmm, not too many respondents on this thread. I reckon that most C250 folks must have an outboard.
How does your engine work, is it mounted inside a compartment underneath the cockpit sole, or does it encroach into the rear of the cabin?
Underneath the boat, is there a skeg that the sail drive is mounted into, thatís ahead of the rudder and behind the keel? Or is it somehow part of the keel?
Very curious about this.

Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain ó Milford, CT
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JB
1st Mate

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USA
92 Posts

Response Posted - 09/25/2022 :  06:16:19  Show Profile  Reply with Quote
I know there are a few owners of them on this site. I may have to be patient.

The unit is between the rudder and the keel in a housing that forms part of the steps into the cabin.

https://www.yanmar.com/marine/product/drives/sd2

1988 C25 Wing Keel Std Rig Tohatsu 9.9 Tiller Steering and 2003 C250 Wing Keel Std Rig Inboard Diesel Wheel Steering
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Robb
Deckhand

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Canada
17 Posts

Response Posted - 09/25/2022 :  21:26:18  Show Profile  Reply with Quote
Hi JB. I have a 2004 250 WK with the Yanmar diesel and saildrive. Not sure what you are referring to re: Diaphragm. Do you mean the rubber diaphragm that goes around the saildrive at the top or the rubber gasket that attaches to the hull and seals around the bottom of the saildrive leg? I replaced the bottom one last year but haven't replaced the upper one as mine is still in good condition. The bottom one was shredded and was quite easy to install but....there are two different ones that look almost identical and depending on your serial # it could be one or the other. I was able to modify the incorrect one to fit but it took some shaving and cutting of the rubber, then installed with Sikaflex 290.

Robb
2004 C250 WK hull# 739
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JB
1st Mate

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USA
92 Posts

Response Posted - 09/26/2022 :  07:10:00  Show Profile  Reply with Quote
Robb the kit includes the rubber piece that surrounds the drive and is glued to the hull and the two internal seals that keep the water out. The part of the kit I don't understand is how the steel bands work and if they need a special tool to apply them. Yanmar recommends inspection every two years and replacement at 5.

1988 C25 Wing Keel Std Rig Tohatsu 9.9 Tiller Steering and 2003 C250 Wing Keel Std Rig Inboard Diesel Wheel Steering
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JB
1st Mate

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USA
92 Posts

Response Posted - 09/27/2022 :  05:59:18  Show Profile  Reply with Quote
Another question how fast can you go? I have a fixed two blade propeller 14 diameter 7 pitch and at 3350 RPM on flat water 5.5 miles per hour at best. Into wind 5 mph or less.

1988 C25 Wing Keel Std Rig Tohatsu 9.9 Tiller Steering and 2003 C250 Wing Keel Std Rig Inboard Diesel Wheel Steering
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