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post #1 of Old 10-13-2010 Thread Starter
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Yanmar 3YM30 in a PS 31 cruising RPM

I am reading and hearing different recommended cruising RPM on my Yanmar 3YM 30.

Maximum RPM from Yanmar is "3200-3600".

The dealer told me that my max RPM is 3200 (I guess for the specific boat and prop I am using).

So is my cruising RPM 75, 80, or 85% of 3200?

Again, dealer told me 75% of 3200, which is 2400 rpm, but I have read higher.

This seems a little slow, and the boat moves at 4.5-4.75 knots.

I would like to think I could run a little higher RPM, and a little better boat speed.

Any other opinions out there? Especially with the same hull and engine.

Rod Johnson
First Sight PS31 #128
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