What would make a lawn mower stop running after short distance It starts back up again with no problem but stay for long?

- Low fuel: If the lawn mower is not getting enough fuel, it will eventually stop running. Check the fuel level and make sure that the fuel line is not clogged.

- Stale fuel: Old fuel can cause problems with starting and running. If the fuel in the lawn mower is more than a few weeks old, drain it and replace it with fresh fuel.

Spark plug issues

- Fouled spark plug: A dirty spark plug will prevent the lawn mower from getting the spark it needs to start. Check the spark plug and clean it if it is dirty.

Air filter issues

- Dirty air filter: A clogged air filter will restrict the air flow to the engine, causing it to run rich and eventually stall. Clean or replace the air filter if it is dirty.

Overheating

- Overheating engine: If the lawn mower is overheating, it will eventually shut off to protect itself from damage. Check the oil level and make sure that the cooling fins are clear of debris. If the lawn mower is overheating frequently, you may need to have the cooling system serviced.

Other issues

- Loose electrical connections: Loose electrical connections can cause the lawn mower to stop running intermittently. Check all of the electrical connections and make sure that they are tight.

- Damaged fuel line: A damaged fuel line can cause the lawn mower to lose fuel and stall. Check the fuel line for cracks or leaks.

- Bad ignition coil: A bad ignition coil will prevent the lawn mower from getting the spark it needs to start. Check the ignition coil and replace it if it is bad.