my pontoon boat motor a 40 hp Tohatsue , i took the hose loose from the motor connector and pumped the fuel water out till it was just fuel and it ran great . i never run a motor till it quits with the fuel line loose that leaves the cylinder walls dry . just keep the fuel tank full and pump the bowl full and keep it full by pumping the bulb often. you weill never run all out and that little bit left will dry up quick.