Join Date: Mar 2007
Location: New England
Thanked 7 Times in 7 Posts
Rep Power: 9
NOLAsailing gave you excellent advice. Provided the engine is operating well and taken care of, 80 to 85% of max RPM is often recommend for a Yanmar diesel (at least mine).
If you have any concerns, give Yanmar a call and they'll advise you in what's best for your motor.