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  1. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    I can confirm that after replacing the blown transistor with the MJE800G unit in the link above the module is fully functional again. I had to buy a used unit to get the part # off of the transistor so now i have an extra (will get it conformal coated at work).
  2. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    So for everyone's reference if a similar issue occurs here is the replacment Darlington Transistor that controls the Aux Fuel Pump: Part #: MJE800 (obsolete), replaced with MJE800G https://www.mouser.com/ProductDetail/ON-Semiconductor/MJE800G?qs=HVbQlW5zcXXyyLGkvlgkjA%3D%3D I have 2 spliced...
  3. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    Can you link to the better schematic?
  4. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    Scoobyshep: I did find the schematic in the TM albeit its super tiny in the .pdf from GreenMountain. So it looks like the module's MOSFET directly controls +24VDC power to Aux Fuel pump. Maybe the pump is bad and smoked the module.... I'll investigate the pump tomorrow (found a guy on ebay...
  5. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    Are you referring to replacing the MOSFET or the module? I could replace the MOSFET if I could find a part # on it. Question is what killed it.
  6. I

    MEP-803A just smoked the "Fuel Float Module" electrical box to right of fuel tank.

    Well my awesome MEP-803A's fuel tank gaskets were in need of replacing and I just replaced the smaller no name batteries with $440 worth of Optima 34/78 batteries (currently sitting at 25.3VDC . I went to test out the Aux fuel pump and put the system to "PRIME & RUN AUX FUEL" without starting...
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