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4HP B&S engine

Discussion in 'Mechanic and Repair' started by SER, Apr 20, 2004.

  1. SER

    SER LawnSite Member
    Messages: 60

    Hey all. I have a 4hp briggs engine on a mower, that is running at high speed. I cleaned the carb, but it still runs at high RMPS. Do I need to change the diaphragm and clean the carb better or what?The engine is about 3-4 years old, never had any service.
  2. sdwally

    sdwally LawnSite Senior Member
    Messages: 386

    If you mean over rated high speed(3600) then check the governor spring. There should be some extra hole in the governor arm to make adjustments.

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