Is changing a fuel pump on a yamaha 100 4-stroke a do-it-yourself job?
Any one know how much they cost?
It is easy (if it is carbed). I have the same motor. Are you by chance replacing the pump bc you have fuel in the oil?
Chris V - Do I get a new fuel pump, or the o-ring between pump and cover? Or both? What is most likely leaking? The internal diaphragm?