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  • Buzz Coils Rx
  • Battery/Distributor RX
  • Magneto Rx:
  • Plug, Wire, Condenser RX
  • Testing 101
  • Magneto and Vintage Tech Store

    • Shop by Brand

  • American Bosch
  • Wico
  • Helicoil and compatibles
  • Fairbanks Morse
  • Snapon
  • Briggs and Stratton
  • Edison Splitdorf
  • Bosch
  • Craftsman
  • Crosby
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    • FM-X4A and FM-X4B 2911C

    The FM X series is a later version of the FMJ series using different points and rotor but very similar. Still a dependable serviceable mag. Here is some service information to keep yours alive and well.

    fm-x4-p1-skinny.png

    As always, make sure that the problem is indeed the magneto and test as described above. Many failures blamed on the mag include incorrect plugs and wires, fuel system issues and fouled plugs.

    fm-x4-p2-skinny.png

    fm-x4-p3-skinny.png

    fm-x4-p4-skinny.png

     

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