Re: replacing my fuel bulb with moeller brand what size?5/16 or 3/8s
Either size will feed your 75 if that is what it is from your sign on name.
However, It never hurts to have extra capacity. The only possible problem MIGHT be: It may be a little difficult to push 3/8 fuel hose through the hole in the engine lower cowling pan. If that's the case, just enlarge it with a drill or reamer--easy, it's usually plastic.
