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post #20 of Old 08-08-2019
chef2sail
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Re: Motoring RPM

Quote:
Originally Posted by Damon Gannon View Post
Does the boat reach hull speed? If it does, then it won't go any faster, regardless of increasing engine RPM. Most likely explanation is that you are "over-propped" (either the pitch or diameter of the prop is too great), so the engine is unable to get up to full RPMs. If it is over-propped, you should consider an appropriately-sized prop because you are increasing the wear on the engine and transmission. Another simple explanation may be your fuel filters. Have you changed them? How does the engine run at idle? Does it run rough or seem like it is being starved of fuel?
Fuel filters, dirty prop, carbon clogged exhaust elbow is were I’d start.


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