Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Oil level has to be lowered, by tipping mower over, so the oil will drain from the dipstick tube, use a flat pan to collect the oil. Drain oil and get it at proper level, the remove the spark plug and spay carburetor cleaner in the hole and spin engine to purge the cylinder, do it three times, then install new spark plug, and start mower, it will stop smoking as soon as the exhaust buns out the oil in the exhaust. Usually less than three minutes.