While you wait for answers, we may have found some information which could help you.
Click here for Briggs Stratton Classic 35
my briggs and stratton 3.5hp starts up then cuts out straight away?
Excessive Compression?
How to fix a problem with briggs&stratton hp407engine?
b/s lawn mower small engine?
Just overhauled 16 hp Briggs ans Stratton engine ?
Briggs and Stratton SP470?