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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

Briggs & Stratton Problem


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  #1  
Old 03-04-2003, 03:25:48 PM
John Edwards
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Default Briggs & Stratton Problem

I wonder if anyone can help with a Problem with a Briggs & Stratton engine on a generator?.The engine is surging up and down in RPM ,Ive checked the gas tank and fuel and cleaned the carburettor but the problem is still there,any help would be appreciated.
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  #2  
Old 03-04-2003, 07:42:19 PM
John Rolli
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Default Re: Briggs & Stratton Problem

Does it surge only without a load? If so its normal,the governor springs are very touchy.try turning in the screw on the throttle shaft until it smooths out but not so much that it wont "float".If you have an auto throttle you cant do it as you wont have an idle mode.John.
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Old 03-04-2003, 09:45:58 PM
Jeff Conner
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Default Re: Briggs & Stratton Problem

Generator engines have a closer regulating governor than standard variable speed engines. As such, they are sensitive and yours is too sensitive to the point of instability or hunting. Sometimes a simple high speed jet adjustment does the trick. Sometimes not. Older Briggs have a number of holes where the governor spring attaches to the governor lever. Moving the attachment point closer to the governor shaft mades the governor more sensitive to speed change. If set too close to the shaft, the engine begins to "hunt" or surge. Most generator governors have some type of adjustment for senstivity. Find yours and back it off a bit.
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Old 03-15-2003, 08:31:30 PM
EDS
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Default Re: Briggs & Stratton Problem

If the engine has seen a lot of use in a dusty environment, the throttle shaft can be worn and loose, particularly the end of the throttle shaft closest to the engine. This allows raw air to be sucked in upsetting the fuel air mixture and would be sensitive to the throttle position. The fix is to replace the throttle shaft.
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