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Think oil ran in carb

Had mower tillted to front a while,checked air cleaner and had a lot of oil in it,cleaned , started and ran about 20 min and quit.Did I mess up carb or what did I do to it?Briggs and stratton 300 series 148cc

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Try to always tilt a mower with the front of a horizontally mounted engine up in the air (head with spark plug end). This will keep the oil from going places it doesn't need to go...like into the carb/air filter area and along the valves into the cylinder head and combustion chamber (unless you get lucky and the piston is running the compression or power stroke with valves closed). You probably loaded the crankcase breather with oil which in turn loaded the carb with oil when you started running it as it vents over via a metal tube an inlet in the air filter housing.
It will take a little time to get all the extra oil thru the carb. To speed this up...pull the breather off the block (on engine side opposite the carb) and stand it up or blow it out allowing all the oil to drain out. Chances are you also need to remove the spark plug and clean it also as it probably is oi-fouled which probably caused the engine to quit in the first place.

Posted on Jul 11, 2010

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