Hello all. I have a 99 Fountain 42 Lightning with 4 tanks. My port hp500 motor would surge, suck air, then stall, at first at 3500 or more rpms, now random rpms. After coil, fuel filter, and fuel pump change, i switched to the aux tank and it runs perfectly. Guessing its a blockage in the port main tank. The port main is now full of fuel, and everyone wants to take the boat out of water to diagnose and fix the problem, does this sound like something that can be fixed dock-side???