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Go Back   SailNet Community > On Board > Gear & Maintenance > HP Motor Requirements
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Topic Review (Newest First)
07-17-2003 12:19 PM
hamiam
HP Motor Requirements

My experience is that, about once a season, I need every last drop of HP out of the 50hp inboard diesel that powers my 35'' sailboat for various reasons. I can do 8+ knots under power which just gives me a warm feeling all over.
07-17-2003 07:06 AM
KenD
HP Motor Requirements

Wives are always right just ask them. A 2hp motor on a dingy is just about enough,and I think a good rule of thumb is 2HP for every ton of boat. I don''t think I would feel comfortable with a underpowered boat in the circumstances you depict,gives me the sweats thinking about that. we are all here trying to help others by our experience
07-16-2003 01:32 PM
hamiam
HP Motor Requirements

KenD: My wife would probably agree with your immature mind comment. And it may indeed be true. That being said, my point in using the expletive was both for effect and a feeble attempt at comedy as, honestly, I find it comical to suggest that a 2hp motor is appropriate for a 23'' sailboat. As a captain of a boat you need to plan for the what if''s; what if I need to return to my mooring in a hurry and the wind and/or tide is against me, what if I need to avoid another boat or get off a lee shore, what if I experience rigging or another mechanical failure, and what if, god forbid, I or a member of my crew is injured and getting to help is urgent? In any of these situations you will be cursing the 2hp engine and thanking the lord for the extra power. Just a thought..
07-16-2003 12:47 PM
natejount
HP Motor Requirements

thanks pirate. over the past 3 weeks I have gotten much better at sailing off and on my mooring without motor help, but if the wind totally died or something, it''s good to know that I may get something out of the 2hp.
07-16-2003 10:28 AM
KenD
HP Motor Requirements

Hamiam
Profanity is the way for an immature mind to express itself forcefully. That gotten out of the way I do concur with your basic premise,that the problem could be anywhere in the drive line,I''m just suggesting that they would check the inexpensive things before calling in the big guns.
07-10-2003 09:13 PM
pirateofcapeann
HP Motor Requirements

I ran all around New England waters for 5 years pushing my Columbia 22 with a 1.2 HP British Seagull. She was a heavy barge as I lived aboard, year round and carried all of the things I needed to make it do-able. I got 3 1/2 knots average out of her. Yes, without a doubt you can push your Kells around with a 2 HP but don''t expect her to come out of the hole like a dragster. You''re not going to hurt it any, it''s only going to push just a certain amount and that''s it. Planning is the key to working around with low HP. As for the big motor, it sounds like the prop has let go from its bushing, in which case, you may need a new prop. Or if it has one, the shear pin has let go.
07-08-2003 11:42 AM
hamiam
HP Motor Requirements

Bite the bullet and bring the ******* thing to an outboard mechanic. While I agree with the above posts regarding the shear pins, it could be a problem anywhere along the drive train. I would not risk burning out my 2hp motor or my boat for something that can probably be fixed for $100.
07-07-2003 10:30 AM
KenD
HP Motor Requirements

Bite the bullet take the thing to a pier an pull the motor then look take the prop off shear pins cost about 50 cents each not a high price to get going again. Don''t know much about the bushing type but with luck the shearpin type will take less time to fix then to read this,besides I hate treading water and or standing in a foot of goo while working on a motor. good luck
07-01-2003 06:21 AM
cyberlord
HP Motor Requirements

Sounds like you have the rubber friction type, but it could be that the shear pin is lodged somewhere causing just enough resistance.

I''d say you have the rubber friction type and they need to be replaced.

I''ve always had shear pins in any OB I''ve operated, so I can''t be of much help in fixing/replacing.

Good Luck,

Tim
07-01-2003 05:36 AM
natejount
HP Motor Requirements

OK, so I jumped in the water, and put it in gear, and it did not spin freely. it went about 1/2 turn each way very freely, and after that it gave some tension but was still easy to rotate, but definitely didn''t spin. Now what? I took it out of the water and I''m going to mount it in a trash can and see what I can see.
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