Briggs and Stratton 500
My Neighbor has a Briggs 500 on a bolens push mower (low end Lowes mower). The mower is about a year old and she overfilled the oil by about 6 oz. I drained off the excess oil and cleaned the plug and air filter. The mower will still not idle smooth. It doesn't blow any smoke from the exhaust anymore but idles up and down as it runs. Any suggestions?