While you wait for answers, we may have found some information which could help you.
Click here for Briggs Hp Lawnmowerlawn mower briggs and stratton classic 35?
lawn mower engine hunting?
litres of oil needed in a countax c600h ride on lawnmower?
Adding oil to mower ?
my briggs and stratton 3.5hp starts up then cuts out straight away?
Briggs and Stratton SP470?