Need help please. This thing is driving me crazy! This is what I have tried.
Compression 150psi all four cylinders.
Replaced distributor
Plugs & wires
Removed exhaust elbow & intake exhaust and water tested for cracks and replace gaskets
Removed burnt exhaust flapper
Replaced wore out...
I have a Nissian NS90A that I and working on. This boat idles ok under no load and runs STRONG from 2000rpm's and up. This thing will shake the whole boat from just above idle til 1500 to 2000 rpm. Tried cleaning carbs. The only thing extra I noted it smokes a lot, and I read about a fuel pump...
