While you wait for answers, we may have found some information which could help you.
Click here for Briggs Lawnmower Engine Hplawn mower won't start?
McCulloch lawnmower parts removal ?
litres of oil needed in a countax c600h ride on lawnmower?
westwood t1200?
lawn mower engine hunting?
my briggs and stratton 3.5hp starts up then cuts out straight away?