Mower starting related troubleshooting

1. Verify that the battery is full and there is a valid connection between modules. Fix if necessary
2. Verify that there is a spark at the ignition
3. Verify if you have enough fuel, and that the fuel is not older than 20-30 days
4. Verify that there is no water in the tank. Fix if necessary
5. Verify if air filer is clean. Fix if necessary
6. Verify that all cables are connected