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Old 10-19-2012
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engine size

So i just purchased an older irwin 25 and the one cylinder yanmar died on me the other day. Im looking at replacing it with an outboard, however I am not sure as to what size of an outboard i would need to move the vessel in and out of the marina it is docked in. leaving the marina is not a problem since its a straight shot, coming in is a different story since most of the time the wind that is coming onto the gulf of mexico is from the marina. Any help would be great.
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Old 10-19-2012
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Re: engine size

I would fix the Yanmar! I have a YSM 8 and its an easy motor to work on, parts are available....Dale
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Re: engine size

thought about it, and it would be a pain to fix. basiclly the entire engine would have to be replaced.
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Re: engine size

A 9.9hp yamaha pushes our Catalina 27 (approx 6300 lbs IIRC) along nicely at about 6 knots for the most part. Forward progress stops when pushing against a 7 knot current. We use the engine frequently
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Old 10-19-2012
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Re: engine size

what happened to the Yanmar. most likely just air in the fuel line or plugged filter. hard to kill that engine. parts are not that expensive and easy to get. which model do you have. it is either a 6HP or and 8HP if it is one cylinder.
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Old 10-20-2012
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Re: engine size

I pushed a Macgregor 25 with a little 6hp in the Cape Fear River where it dumps into the AICW. Some difficulty in the stronger currents but I still got wherever I needed to go.
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Re: engine size

I have probably the same Yanmar as you-- 1GM, which is 31 years old. I also would not give up easily on it. What do you mean by "died"?

That said, I think an outboard in the 8-10 hp range would do just fine.
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Re: engine size

Well basically what happened was this. Im motoring through tge intercostal waterways and the engine craps out. I try to start it, wobt turn over. Checked diesel levela and those were good. My mechanic looked at itvand was supprised ut even ran. Everything is all rusted etc.
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Re: engine size

Not familiar with your boat but had a Coronado 25 with a 6HP outboard on it which was OK in calm water. Went to a 15HP, same size and weight as a 9.9HP and it was plenty. The 9.9 would probably have been enough. A transom mounted motor may not be as simple as it appears. You are taking weight from down low, between ends, and are putting it up high all the way back. A big problem may be keeping the prop in the water when it gets rough. If you go with an outboard get the longest shaft that will fit. You may be able to re-build or re-furbish the diesel for the cost of an outboard and transom bracket which also may require strengthening the transom on the inside. Once you get the diesel out and cleaned up it may not look so bad. What specifically is wrong?
Sounds like perhaps it seized up? Will the starter turn it over? If so, it may be just a fuel related problem. Suggest you give the diesel another chance to live. Let us know how it all comes out.

Paul T
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Re: engine size

She wont rurn over at all
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