MTD Gas lawn mower Parts — Browse All Models

Replacing the spark plug in your MTD gas walk-behind lawn mower

• When the engine is cool, disconnect the spark plug wire from the spark plug.
• Use a spark plug wrench to loosen and remove the spark plug.
• Use a spark plug gap tool to set the gap between the center electrode and the ground electrode. The gap specifications for your model are in the owner's manual.
• Thread the spark plug into the engine. Then tighten the spark plug with a spark plug wrench.
• Reconnect the spark plug wire and start the mower to make sure it runs.

How to fix your MTD gas walk-behind mower when it won't cut evenly

If the mower isn't cutting the grass evenly, first make sure that the wheels are set at the same height. If a wheel is damaged, replace it to ensure that the mower travels evenly over the lawn.

Also check that the blade is sharp and undamaged. A dull blade tatters rather than slices the ends of the grass, leaving the tips brown and dry. A damaged blade is off balance, so it cuts unevenly. Replace the blade if it's damaged.