We may have found other answers which could help you.
Click here for Engine Lawn Mower Horsepower
Briggs and Stratton SP470?
my briggs and stratton 3.5hp starts up then cuts out straight away?
lawn mower won't start?
what causes my Briggs and Statton petrol mower to hunt ?
Excessive Compression?
lawn mower briggs and stratton classic 35?