While you wait for answers, we may have found some information which could help you.
Click here for Correct Spark PlugBriggs and Stratton SP470?
lawn mower engine hunting?
How can I fix Mountfield Laser Omega 46 Lawnmower?
lawn mower won't start?
lawn mower briggs and stratton classic 35?
litres of oil needed in a countax c600h ride on lawnmower?