Onan Fuel Pump

Jonak

Member
How can I check if Fuel pump is good when pump is off 318 JD, Onan Engine?? Thanking one and all for Your time to submit a reply:>))
 
Put a piece of tubing on the inlet side and stick it in a can of water-pump lever and see if it picks up and starts pumping.
 
This is a pulse type pump and it is nearly impossible to test it off an engine. You can disassemble it and check the diaphram for cracks or stiffness and inspect the 4 check valves. It is a pretty simple pump.
 
Does it have a port that a hose from the crankcase attaches too? If so you can hook it to another engine that runs to test it.
 
Thanks to the comments. Got it checked out OK, put it on and is running good. Thank each one of you!!!!
 

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