While you wait for answers, we may have found some information which could help you.
Click here for Lawn Mower Engine Carb
my briggs and stratton 3.5hp starts up then cuts out straight away?
Just overhauled 16 hp Briggs ans Stratton engine ?
Petrol or diesel?
lawn mower briggs and stratton classic 35?
Excessive Compression?
How to fix a problem with briggs&stratton hp407engine?