1987 30 hp 2 stroke fuel pump question

[wpg manitoba]

hi there, I removed my old fuel pump and noticed that there was no gasket, and I have my new fuel pump but it didn't come with a gasket either, I am to assume that it doesn't need one? Am I missing something here?

 

[carholme]

Re: 1987 30 hp 2 stroke fuel pump question

What is your engine s/n? Reason I ask, is it sounds like this may be a Mariner.

Gerry

 

[Texasmark]

Re: 1987 30 hp 2 stroke fuel pump question

The fuel pump is a diaphragm operated by pressure impulses from the piston movement. It has 2 check valves to allow it to suck and hold on one stroke and push and hold on the reverse. In my opinion, I would want maximum pressure/suction from the cylinders so a seal would be in order. Just because you don't get a seal in the kit doesn't mean it doesn't use one. Just because your 26 year old engine doesn't have one doesn't mean it isn't supposed to have one. John Deere is really bad about selling you the seal separate from the part. Why? Guess it's because sometimes the seal goes but the part doesn't. Conversely some parts come with seals, like cartridge oil filters.

HTH,
Mark

 

[wpg manitoba]

Re: 1987 30 hp 2 stroke fuel pump question

Yes it is a Mariner, I just called them about the gasket and they said that there is no gasket? Can anyone confirm this? It's seems very strange that there would not be a gasket there.
I hope to start this engine up sometime and hopefully this new fuel pump solves the problems, but I question the no gasket issue. Also if anyone know's the torque lbs I tighten the fuel pump bolts, that would also be nice