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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
  • Fairbanks Morse
  • Helicoil and compatibles
  • Snapon
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  • Edison Splitdorf
  • Bosch
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    • JEM Manual

    Here is a factory owners and parts manual for the Wico JEM. These made a brief appearance in some Wisconsin engines and Oliver tractors. Hopefully this will keep yours alive and well.  They share many of the same parts as the model J4.

     

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     Beware of P/N X1413. Most black plastic cased devices found will be bad and cause a wimpy spark or no spark at all.The condenser for the more popular Wico Model C is a readily available replacement.  The Wico C also uses the same points as the JEM and are still available.

     

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