Quote:
Originally Posted by Trundlebug
My FD boat has a plate near the helm, placed by the engine manufacturer (Volvo Penta). It says:-
"Cruising speed 200rpm below obtained top speed"
obtained top speed will be at max revs - 3600rpm officially,
I generally cruise at around 2000rpm, or 7.1 kn which seems the best speed for noise / vibration / speed / fuel consumption compromise.
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My Volvo is the same...and I also cruise at 2K at 7.5 knots or so. Seems the most comfortable for the engine and SD hull form and averages 2 GPH at that number. WOT at 3600 is around 17 knots