It could be a couple of things. I would check and make sure the oil is filled. Some engines have low oil shutdown that will shut it down if the oil is too low. Make sure there is no water in the gas too. A little water could stall the engine. Check the spark plug and spark plug wire. A short or misfire may be enough to shut it down. Beyond that, I recommend a good repair shop.
A number of reasons: Loose electrical connection, bad coil, bad coil wire or bad plug. Try a new plug, it will be the cheapest fix. It could be a problem with the fuel delivery system, but I doubt it-if it starts right up, after cooling off. It could be overheating and not enough value clearance. Clean the grass and dirt off, around the cylinder and flywheel. That's cheaper than a value job.
one reason for this is the air inlet on the petrol cap is blocked or too small causing a vacuum in the petrol tank and starving the motor.
Automotive window washer systems are self priming. Assuming the reservoir is full, you may have a bad pump, cracked/pinched hoses or plugged nozzles.
If its a new mower take it back to where you bought for warranty If you mess with it you will forfeit your warranty.
The float valve is probably stuck open.
Ask Verizon
Just try again in a few minutes or restart your computer.
about 500 hours
To restart your computer simply remove the positive terminal from the battery for 5 minutes.
Check your fuel filter and pressure.
30 minutes when the burner has cooled
If you able to restart after a few minutes, then your CMP is defective.