What are the consequences if I overfill with oil on a lawn mower engine?

[Sabastien G]

I decided to get rid of some oil and i decided to change my lawn mower oil. I had some left and went ahead and poured the whole bottle in there. The oil level is just a bit higher than the "High" market. My engine is burning a little oil. How much can this damage my engine?

[gib]

Be careful not to over any lawnmower engine. just a little extra may not hurt the engine but a lot can even keep the piston from going up and down. one of my own experiences was on own towns big trash pickup day I was driving down the street and next to a trash container was a brand new lawnmower. i pulled the start rope but it wouldn't move. I loaded it up in my van anyway and took it home. after checking it out I found thatthe crankcase was so overfilled with oil that the piston wouldn't move. I drained it and reserviced it with the correct amount and I used it for ther next 5 years. I found out later it belonged to our mayor. He's a lawyer on the side too. DUHHHHHH

[Mr. Knowitall]

It might smoke if you tip it sideways, but it won't hurt anything.

[paul o]

Being a little over full shouldn't cause damage.It may result in an increase in oil splash withing the crankcase which may allow some oil to enter the crankcase breathing tube.This oil will be drawn into the carby and may result in some smoke blowing or possibly some spark plug fowling.The engine my seem a little less powerful due to increased drag on the crankshaft caused by a higher than standard oil level.

[allblackskikass]

probably best to drain some to get it back to the h mark.