Briggs Twin Fuel Pump won't pump

Discussion in 'Mechanic and Repair' started by Rain Man av, Mar 14, 2012.

  1. Rain Man av

    Rain Man av LawnSite Member
    Messages: 133

    42A707 2653 E1, 17.5 HP Briggs twin cylinder engine.

    Fuel pump is one of those four bolt ones. Replaced fuel line, fuel filter, installed new fuel pump kit. No matter what, it won't pump fuel. mower will run with starter fluid.

    On the fuel pump body are two ports, one to the side, and one at the bottom, engine hose is connected to one on bottom, and fuel to one on side. Just a test, I reversed those and still no fuel pumping. Currently the fuel pump is apart. Carb is still on intake. I have the main body of the fuel pump in for a soak. I have sprayed all passages on pump and carb and it appears all are open. Both springs and diaphragms built in to the main fuel pump thingee are present.

    I have another FP I could rob parts from, but before I take that one apart, I want to determine what is problem. I've worked on these before and have NEVER had this problem.

    I need diagram to make sure I am putting the fuel pump together correctly. Also, if I am putting the FP correctly, then what could be causing not to pump ? Inquiring minds want to know.


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  2. Rain Man av

    Rain Man av LawnSite Member
    Messages: 133

    turns out the plastic part of the fuel pump was clogged, after letting soak for several hours, I reinstalled it. It pumped gas and engine ran just fine.

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