How to Change the Oil on a Walk-Behind Lawn Mower

Regular oil changes are critical to keeping your mower's engine in top shape and prolonging the life of your mower. The instructions below will explain how to change the oil in a Cub Cadet walk-behind mower. Depending on your mower model, the instructions may vary slightly from the directions in your operator's manual. Always refer to your operator's manual for comprehensive instructions on changing lawn mower oil before getting started.


Step 1: Prepare your mower for maintenance. Place your mower on a flat, level surface. Turn the mower off and make sure the engine is cool.  Disconnect the spark plug ignition wire and remove the key if equipped. This helps to ensure the machine doesn't start accidentally and cause you or those around you harm.

Step 2: Place a piece of cardboard under the work area to catch oil drips.

Step 3: Use an approved oil basin to catch the used oil as it is drained from the engine.

Step 4: Remove the dipstick from the oil fill tube.

Step 5: Drain the oil.

Use a siphon pump: Place the siphon drain tube in the oil fill tube. Prime the siphon pump and once oil begins to flow it will free flow without further pumping.

Use the traditional drain method: Tip the mower onto wooden blocks with the air filter facing upward and allow the oil to completely drain into an approved oil basin.

Step 6: Add new oil. Use the oil recommended by the engine manufacturer. Fill to the recommended levels.

Step 7: Reinsert the dipstick. Check the engine for proper oil levels.

Step 8: Finish and cleanup. Clean up any spilled oil and dispose of the used oil at a proper facility.

Step 9: Reconnect the spark plug ignition wire.

Use our parts finder to locate and order any replacement parts you may need for maintenance. Refer to your owner's manual for additional maintenance information.