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Stationary Engines Discussion Forum

Briggs Stratton making a Knocking Noise Rod

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Brad in SW MO

03-13-2005 18:58:52




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I have a Briggs 11 hp motor that stars and runs fine but makes a loud knocking noise. I pulled the bottom cover off but can"t find any slack in the rod at all. Is there anything else that could cause the noise? Any help is greatly appreciated. Thanks.




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lucasss

03-16-2005 17:09:45




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 Re: Briggs Stratton making a Knocking Noise Rod in reply to Brad in SW MO, 03-13-2005 18:58:52  
were the bolts that hold the engine to the tractor loose? if so, that can cause a knock. lucas



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Bob

03-13-2005 19:23:25




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 Re: Briggs Stratton making a Knocking Noise Rod in reply to Brad in SW MO, 03-13-2005 18:58:52  
If the rod is, in fact, OK, I have seen engines with a chunk of carbon or other foreign material imbedded in the top of the piston, including an errant throttle plate screw.

Way too much valve tappet clearance, or a worn bore or damaged piston can cause noise, too!



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