76 Merc 850 fuel pump

dchris

Petty Officer 2nd Class
Joined
Jun 10, 2007
Messages
135
My Problem: When I pump my fuel bulb I get good fuel flow. When I turn the starter I get a dribble of fuel. I would expect it to fill a small cup in 10 seconds or so. I won?t even fill a tea spoon in 10 seconds of cranking.
What have I done: I replaced the diaphragm and in-let values on my fuel pump. My replacement kit also had a spring and plastic piece to push on the diaphragm. I went ahead and tried it with and with this. No change in the results.
What?s next?
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: 76 Merc 850 fuel pump

There should be no spring in your pump, there are a couple of different type gaskets for the triangle shaped pumps did you get the right gaskets in your kit?
 
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