Now that I have the 85/75 hybrid up and running on my 17 ft tri-hull, it seems to really suck gas. I need to get the tach working to see what the RPM's are at WOT, but it just seems to be excessive for the driving I'm doing. I can get up on plane, trim it out, and then bring the throttle back into the "fuel saver range" and cruise around at a comfortable 25 mph or so. I have a new 17 pitch prop, 135lbs in all 3 cylinders (cold, havn't verified when warm yet), timing/carb settings are correct and linked properly, fuel drain back in the bottom of the carb cover is free, and a new fuel pump gasket. I get some smoke after running it after it has been shut off and sat, and a little oil on the water around the engine when shut down. I'm wondering if some gas is just being dumped overboard a little at a time somehow?
What's the typical fuel consumption on these engines? If I am pulling a tube or running at a higher RPM, it seems like it will suck a full 6 gallon tank in about 30 minutes or less. I have verified the foam is not full of water, giving me a bunch of extra weight. Boat is usually lightly loaded, at most 2 people in the boat, and one on a tube (one can drive while the other watches the rider).
What's the typical fuel consumption on these engines? If I am pulling a tube or running at a higher RPM, it seems like it will suck a full 6 gallon tank in about 30 minutes or less. I have verified the foam is not full of water, giving me a bunch of extra weight. Boat is usually lightly loaded, at most 2 people in the boat, and one on a tube (one can drive while the other watches the rider).
