While you wait for answers, we may have found some information which could help you.
Success
Message
lawn mower engine hunting?
How to fix a problem with briggs&stratton hp407engine?
lawn mower won't start?
lawn mower briggs and stratton classic 35?
Excessive Compression?
Briggs and Stratton SP470?
Petrol or diesel?
my briggs and stratton 3.5hp starts up then cuts out straight away?
Just overhauled 16 hp Briggs ans Stratton engine ?
b/s lawn mower small engine?
what causes my Briggs and Statton petrol mower to hunt ?
Briggs and Straton Motors?