B&S Vanguard starting problem

Discussion in 'Mechanic and Repair' started by Birdman, Nov 15, 2003.

  1. Birdman

    Birdman LawnSite Member
    from 6
    Posts: 51

    I need some help trouble shooting a Briggs Vanguard. It will only start if I disconnect the kill switch from the coils.
     
  2. UNISCAPER

    UNISCAPER LawnSite Bronze Member
    Posts: 1,426

    Sounds like there is any one or several of your safety switches making contact, thus grounding the juice from the coil and keeping it from going where it supposed to...Try disconnecting each switch, one by one, then reconnecting until you get the engine to start. Either adjust, or replace that switch...
     
  3. Birdman

    Birdman LawnSite Member
    from 6
    Posts: 51

    You mean, all I have to do is unplug the switchor do i need to put a jump wire across it? Thanks for the help.I'll be waiting.
     
  4. ProMo

    ProMo LawnSite Bronze Member
    Posts: 1,468

    not sure wich briggs but my father in law was saying something the other day about the ground wire from the coils was gettting hot and wearing the insulation on several of there concrete machines
     
  5. UNISCAPER

    UNISCAPER LawnSite Bronze Member
    Posts: 1,426

    Birdman:

    What Vangard engine do you have, how many HP, and what is it installed on?
     
  6. Fish

    Fish LawnSite Member
    Posts: 139

    It doesn't really matter what engine you have on this one,
    as the small wires to the coil/coils goes to the equipment's wiring,
    and that connection goes to ground to ground out the ignition
    and shut the engine off. It would be helpful to know what
    equipment you have though. In general, check the seat safety
    switch first.
    Fish
     
  7. Birdman

    Birdman LawnSite Member
    from 6
    Posts: 51

    It is a B&S Vanguard 16 HP -303447 Deutz Allis. I have tried all the saftey switches ( I think) To bypasss them , all you have to do is put a jumper wire across the plug, right? This all started when the ignition switch failed. (Key broke off) As for the switch switch, if you are not on the seat the engine will not even crank over, when you are on the seat the engine does crank .. just no spark.
     
  8. Fish

    Fish LawnSite Member
    Posts: 139

    Look at the prongs on the back of the original keyswitch,
    you should find letters there somewhere, they should
    match the replacement switch's letters exactly.
    You can burn up your coils with the wrong keyswitch.
     

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