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skolbe, we can get different readings on the rpm gauge, so i think that is wired correctly. I will have my mechanic check it out to be sure. Vince, I was thinking that it would not be a fuel leak because the problem gets worse with higher rpms, and there is no leak when the engines are not on...

The difference really depends on the RPMs. At really low RPMs one engine will use about a gallon of gas more per hour. On average we are finding that one engine is using about 4 gallons ever hour more than the other. This is around 2500 RPMs on both engines. And this is with the generator off.

yes we have checked the fuel gauge and been mindful of how much fuel is filling the tanks. We will top both tanks off and run both engines the same for a day and then fill them up later that same day and one engine will have used a lot more fuel. up to 30 gallons. we are thinking that one...

My Brother has a 2006 340 Sundancer with 2 MerCruisers and we have been getting different gas mileage on the port and starboard engines. We have had it serviced multiple times, getting the Props calibrated back to factory specs, New top of the line Spark plugs and cables, Full Tune Ups, Fuel...