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Old 04-20-2004, 02:14 PM
SER SER is offline
LawnSite Member
Join Date: Mar 2004
Location: Naperville,Illinois
Posts: 60
4HP B&S engine

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.
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Old 04-20-2004, 02:46 PM
sdwally sdwally is offline
LawnSite Senior Member
Join Date: May 2001
Location: San Diego, CA
Posts: 385
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.
Clay Walsten
Developed Regional Parks
City of San Diego

We enrich lives through quality parks and programs.
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