12.5hp Briggs 21a707 still blowing oil

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  #1  
Old 04-24-08, 12:55 PM
rebeltaz's Avatar
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12.5hp Briggs 21a707 still blowing oil

I have a 12.5 hp Briggs and Stratton engine (27a707 0223) that, among other problems, is blowing the breather tube off the carburetor and spewing oil. I have replaced the breather reed but it is still doing it. Any ideas? I am stumped!



Thanks....
 
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Old 04-24-08, 06:04 PM
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Gotta ask, Is it over full of oil ?

Does the oil smell like fuel ?

If no to either of the above It sounds like worn rings causing too much crankcase pressure. A cylinder leak-down test would show the condition of the rings and valves.
 
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Old 04-25-08, 12:56 PM
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I did check the oil level and there isn't any gas in the oil.

I will do a leak-down and see. Thanks...
 
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