How does a primer bulb on a lawn mower work?
How does a primer bulb on a lawn mower work? How it works:Primer bulb is pressed and released.When released a vacuum is created and fresh fuel is drawn into the intake fuel line.The intake fuel line deposits fuel into the carburetor making it ready or “primed” for combustion. Is primer bulb supposed to fill with fuel? the primer bulb should be mostly fuel, check the lines they get old and start cracking. replace with tygon. there is a fuel pump in the carb operated by pulses from the crank case, the diaphragm in it can can go bad also. Will...