Re: Boat cuts in and out only on plane
Check fuel supply. A quick check for vent clogs is to try running with the gas cap off or loose. Also, there's an anti siphon valve in the tank exit that can cause a restriction. You can use a mechanics water hose hook to take the fuel hose off the barb, then remove the valve and exercise it with a little piece of plastic or something. Also clean it up with carb cleaner.
Remove and replace fuel filters. You probably have an inline fuel water separator that looks like an oil filter, that's a throwaway part, just change it. There is a screen at the inlet to the carb, that can be removed & cleaned.
Test or replace the ignition wires. They might not look bad, but they can short while still functioning at your lower RPMs. A man smarter than me suggested getting a test light, ground one lead and run the other end along the igniion wires while the motor is running (hold with something insulated or you could get a belt). If the light illuminates there is the problem.
