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Step 1
Remove any remaining fuel from the lawnmower. Use a siphon pump to siphon out as much as you can and put it into an appropriate gas container. It is better to use the fuel in another piece of equipment if you can, rather then storing it for the winter. Then start the engine and run the lawnmower until it is empty.
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Step 2
Change the oil and filters while the engine is still warm so the oil will flow freely. Be sure to properly dispose of the old oil.
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Step 3
Inspect the spark plugs. If the spark plugs are worn and damaged, this is a good time to change them. If the spark plugs are dirty you should remove them for cleaning.
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Step 4
Lubricate the engine. If you already have the spark plug out, this is a perfect time to do this step. If you did not need to remove the spark plug in the last step, remove it now. While the spark plug is out, put a teaspoon of oil through the port. Replace the spark plug and pull on the start cord several times to distribute the oil.
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Step 5
Clean the lawnmower engine. The best way to clean the engine is using compressed air. Be sure to clean the cooling fins to prevent the lawnmower from over-heating.
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Step 6
Clean the lawnmower. This is a basic, but important step to prepare your lawnmower for storage. Remove all dirt and grass clippings from the mower. Rinse all surfaces with water and wipe dry.
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Step 7
Sharpen or replace blade. After being used all summer, chances are good that the blade on the lawnmower is no longer sharp. A sharp blade does the best job of cutting grass. You may need to have the blade professionally sharpened or replace it.
