Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello, is the gas new? Is the grass high ?
Does it stay running when not trying to mow?
Does the engine have a primer or auto choke? Will it run better with the air filter off?
Try removing the paper air filter to see if any difference. Does it sound normal no load?
Does it restart easily when hot? Do you have a compression gauge? Oil is proper level?
If all was well it should start right back up. Have a spare plug and check for spark as soon as it quits. Does it make any whistling sound? Check the head bolts, torque them in a criss cross pattern
Did you make sure fuel flowed from the tank through the hose steady?
What was the compression reading?
The valves could be a little worn and the valve lash may need adjusted.
Do you have a shop manual? If not would you want one?
You're welcome. Good luck!