Went to look at and possible purchase a John Deere sabre tonight with a briggs and stratton 14.5 OHV I/C. Mower started right up, drove around the yard for a little while then it died with a big puff of blueish white smoke. Started the mower again and it smoked right away but cleared up after a minute or so. Started driving around the yard again and after a minute or two the engine died again with the smoke. Removed the air filter and atarted the mower again and let it run at full throttle, when the mower died again there was fuel and oil mixed coming from the crankcase breather and going into the carb causing it to flood and die. Is this a simple fix or does the motor need new rings/ rebuild?
Sounds like the needle valve and seat in the carb is bad
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