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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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  #1  
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engine size?....

Guys,

Not my boat, but what engine size do you recommend for a 28 ft, long-keeled sailboat, displacing 4.5 ton?

I thought a 20 hp would do it.

Thanks.

Rockter
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Re: engine size?....

20 hp would be good for a 9,000 lbs. boat. The general rule of thumb is around 2 hp per 1,000 lbs. of displacement.
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Re: engine size?....

Hey,

My Newport 28, around 7000lb, came with a 16 HP engine. I had a 2 blade fixed prob. I thought the engine had plenty of power.

I would think that 16-20 HP would be fine for a boat up to 10,000 lbs.

Barry
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Re: engine size?....

IMHO, that's nominal. Personally, I'd go a tad bigger; Justin case ya need to get out ta Dodge right smart
Given that most are not really labeled at. true,, normally use able HP; mebbe something in the 25-30 HP range?
Facing head-on or.building seas, nasty increasing wind on the nose, aand a need to get to that hole. quick? Mo'is better

Factor in the possibility of engine-driven adsons and your HP output quickly gets eaten up.

Plan Aheab
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Re: engine size?....

For a 9000 lb boat you could probably get away with a bit less power, maybe 14 to 16hp. But 20 hp wouldn't be terribly excessive, IMHO. It would probably be a good idea to take a long, careful look at the available engine space, and how you are going to get to the various bits when it's time to service the engine (filters, zincs, water pumps, priming gizmo, etc.). On many boats of that size a 20 hp engine would be a pretty tight fit and/or make servicing an almost heroic task. A slightly smaller engine might make things just that much more tolerable.
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Re: engine size?....

Thanks guys.
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Re: engine size?....

FWIW, my 6-ton classic was originally fitted with a Henry Meadows 25hp donk. 20 years later the owner upgraded that to a 35hp Peugeot. Fast forward another 20 years and it's fitted with a 40hp Volvo and I now find I can tow an S&S30 (~5 ton, I suppose) plus a Tumlaren (another 3 tons?) at hull speed without even hitting maximum revs.

So, methinks 20hp will be fine for your lightweight flyer.
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