Re: fuel bulb loosing pressure
One,your fuel line or bulb is faulty or leaking air.Two,your fittings,either to tank or more likely to motor could be worn or leaking air.Especially if the fitting to motor is the cheaper plastic one.Third would be the fuel pump.Rebuild it.Cheap and easy to do.If your fuel line assembly(bulb included)is old,i would go ahead and replace first anyway since todays fuel will break them down from the inside causing leaks or pieces to break off your line or bulb and clog the carb jets,causing a lean condition and loss of lubrication to your cylinders.that=BAD.
