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post #3 of Old 01-13-2013
Courtney the Dancer
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Location: San Juan Islands., WA, USA
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Re: Overpropped; What to do?

Sounds like you are severely overpropped. Your engine is doing the work it was designed to do at 80% of it's rated HP (push the boat at hull speed) at 50% of WOT. That means the engine is working almost at it's maximum (400 rpm below maximum rpm) to move the boat but only has half or less of it's horsepower to work with. Get the prop re-pitched, or a new prop, your engine will thank you (it will last longer and be less prone to blow a head gasket, etc). Call a reputable prop shop and ask them, they'll undoubtedly have horror stories for you.

SV Laurie Anne

1988 Brewer 40 Pilothouse

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