Reply To: Johnson FD-12 Won’t Run

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March 13, 2023 at 5:12 pm #273819
Don
Participant

    US Member

    Well, I guess I wish you had just found another bypass cover with a fuel pump port, and used the standard OMC fuel pump.  This way, you could just plug off the pressure outlet nipple.

    I’m not sure just how that pump you have works, does it work off pressure and vacuum signals, or just pressure signals?  I’m not sure about the method you described concerning the reed plate.  It is possible that a problem with the reed plate is causing this sneezing fit as well.

    Don’t forget, it is possible that there is an air leak/restriction in the inlet fuel line somewhere causing the pump not to work as well.  But, it seems like the engine continues to run OK if you pump the fuel bulb.  At this point, I wouldn’t rule out anything.