Official Sears lawn & garden engine parts

What to do when your Sears riding mower engine won't start

There are numerous explanations for why a riding lawn mower won't start, including everything from bad gas or a bad battery to a failed starter motor or bad ignition coil.

If you find yourself constantly having to charge the battery before starting the engine, a bad battery or failed alternator could be causing the problem. Connect the battery to a charger and if the battery won't charge fully within 8 hours, then you'll likely need to replace the battery. If the battery is okay, then a problem in the engine's charging system is causing the constantly drained battery. The engine uses an alternator to generate current, which constantly charges the battery and powers the mower's electrical system while the engine runs. When the alternator fails, the battery attempts to power the mower on its own and quickly drains without recharging.

If the engine spins but won't start when you turn the ignition key, the engine is missing one of its key ingredients for starting-fuel, compression or spark. Check your basics first, then watch our riding mower engine spins but won't start video for troubleshooting tips to get the engine started.

What to do when your Sears lawn and garden equipment engine leaks gas or oil

Check the oil level when the engine leaks oil. Drain oil to the full mark on the dipstick if you find the engine overfilled. A leaking head gasket or sump gasket can also cause oil leaks. Replace any damaged engine gaskets.

If you notice gasoline stains on the pavement or garage floor, investigate the source of the leaking fuel. Rebuild or replace the carburetor if it leaks gas. Check the fuel pump for leaks and replace the pump if it's damaged.