How to Troubleshoot the Starting of an MTD Riding Mower

Check the deck lift lever. The mower requires the deck lift lever to be fully disengaged before the mower will start. Move the deck lift lever to the "Disengaged" position.

Check the amount of fuel in the fuel tank. If the fuel level is close to empty, add more fuel until the fuel level is near the "Full" mark.

Check the spark plug lead. The spark plug lead should be firmly attached to the spark plug. Locate the spark plug near the front of the engine. Push the spark plug lead onto the spark plug firmly, using your fingers.

Clean the air filter. Locate the air cleaner housing near the front of the engine. Remove the air cleaner housing nut, using your fingers. Lift the air filter to remove it from the housing. Clean the air filter with soapy water, or discard and buy a new one. Reinstall the air filter and air cleaner housing. Tighten the retaining nut, using your fingers.

Replace the battery. If the engine will not turn over, you may need to replace the battery. Lift the seat and disconnect the black battery cable, using an adjustable wrench. Remove the red battery cable. Lift the battery out of the battery compartment. Install a new battery. Connect the red battery cable, using an adjustable wrench. Connect the black battery cable. Tighten both connections securely with an adjustable wrench.