* Park the mower indoors on a flat surface.
Step 2
* Turn off the mower and allow it to cool completely.
Step 3
*Disconnect the spark plug wire from the spark plug to prevent the mower from starting accidentally while you're working on the oil drain plug.
Step 4
* Place an oil drip pan under the mower's oil drain plug.
Step 5
* Use the appropriate size wrench to loosen the oil drain plug on the bottom of the mower.
Step 6
* Allow the oil to drain completely into the oil drip pan.
Step 7
* Remove the old oil filter and install a new one.
Step 8
* Replace the oil drain plug.
Step 9
* Reconnect the spark plug wire to the spark plug.
Step 10
* Start the mower and allow it to run for a few minutes, checking for any leaks.
Step 11
* Dispose of the old oil and filter according to your local regulations.
