While you wait for answers, we may have found some information which could help you.
Click here for Mower Will Not StartMcCulloch lawnmower parts removal ?
my briggs and stratton 3.5hp starts up then cuts out straight away?
lawn mower won't start?
Adding oil to mower ?
How can I fix Mountfield Laser Omega 46 Lawnmower?
lawn mower briggs and stratton classic 35?