I am having issues with a Johnson 90hp Motor and fuel tanks. I have two fuel tanks on my 1983 Ranger 372v boat with a Left and Right tank selector. When I try to pump up the bulb it never gets hard, and that tells me that it sounds like an air leak or a bad bulb. I have replaced the fuel lines twice and the fuel selector twice also replaced the bulb and the same systems. Also in regards to the motor the model number is J90MLCRD, I have disconnected the VRO pump and plugged the lines because I don’t have an oil tank in the boat. I am also pre-mixing the oil and gas at 50-1. This motor will not idle and sputters all the time, is this due to the fuel system problem that I am having or does the timing need to be checked since I plugged the VRO pump. Please help, I just want to go fishing and not work on this thing every time that I go.

Thanks