you have hit something and sheared the flywheel key. the ignition timing is out. fit a new briggs (aluminium) key and it will go again.
peter, September 2007
try checking that the flywheel key on the crankshaft is not sheared
also it could be the inlet valve is stuck open
if it is a rotary lawnmower make sure that the blade is tight
w. murphy, September 2007
try checking that the flywheel key on the crankshaft is not sheared
also it could be the inlet valve is stuck open
if it is a rotary lawnmower make sure that the blade is tight
