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orange hot muffler on 4-stroke

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  #1  
Old 12-02-10, 05:18 PM
sgull's Avatar
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Join Date: Nov 2007
Location: AK
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orange hot muffler on 4-stroke
The muffler on my Briggs Stratton four-stroke single cylinder OHV air cooled engine on my pressure washer started getting red-orange hot on the exterior of the muffler after running a minute or so, then it started to kind of sputter while bluish flames started popping and firing out of the muffler too. So I shut it off. Obviously something wrong, but what might be some first things to check?
 
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Old 12-02-10, 05:26 PM
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Location: Iowa!!!!!
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The fuel/air mix is lean = dirt in carb jets or some restriction to fuel flow, like a cap vent or filter. Usually it's a carb cleaning to fix it.
 
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