I have a 1981 C25 with a swing keel and a Johnson Sailmaster 9.9 hp motor. Does anybody know what I should expect for fuel consumption when motoring at 5 - 6 knots for long periods of time?
I have a Merc 9.9 built in l985 without a thermostat (did not make oneat that time) and I get about an hour and half per gallon running atfive knots (about 3/4 full throttle) I also have a prop with the maximumpitch I could purchase for this motor which makes it move faster ata slower RPM.Lots of things you have to consider here. I do long trips and alwayscarry a couple of extra gallons of fuel just to be safe.Ken CaveDragon Tail #789
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