smoke in lawnmower

Lawn mowers run on smoke. When the smoke gets out, they stop running.

You either added too much oil, or tipped the mower the wrong way at some point. If the latter, it will stop smoking after a few minutes operation. Does it have a dipstick? If so check the oil level - Take the dipstick out, wipe it clean, put it back in all the way, take it out again. Holding it level, the oil line should be between the two lines on the dipstick. The mower should be on a level spot when doing this.

Bob

Bob

The smoke is OK as long as it eventually stops. Let it run for five minutes or so.

overfilling the oil can do this big time.

check oil level again carefully

Are you sure you used the right oil? For a 4-cycle engine, 30W would be OK, but if it's a 2-cycle engine with an oil reservioir, that requires a different type of oil that is NOT the same as

It sounds like you used automotive oil in a 2-cycle engine. Don't just "try it", you'll have to figure out what it needs. Usually there will be a label nearby. Otherwise, ask someone, maybe a neighbor?

With a brand, model, size, etc., it's possible someone here could tell you. Get all the info off the plates you can find and post it here.

Pop`

You trollably put the gas in the oil and oil in the gas tank, Use a match to burn it off