How to Winterize a Riding Mower for Storage

Add fuel stabilizer to a full tank of fresh gas. Run the engine for 10 minutes to circulate treated fuel throughout the entire system.

While the engine is warm, change the oil and oil filter. Warm oil drains more completely and removes more contaminants.

Replace the spark plug(s). For twin-cylinder engines, replace both. This is a good time since the engine is apart anyway.

Clean or replace the air filter and pre-filter.

Replace the fuel filter (inline canister in the fuel line).

Remove the mower deck and scrape all caked grass off with a putty knife. Spray the clean deck with silicone.

Inspect the drive belt for cracks, glazing, or fraying. Replace if worn.

Check and sharpen (or replace) all mower blades. Reinstall the deck.

Grease all fittings — check your manual for locations. Most riding mowers have 4-8 grease points on spindles, wheels, and steering.

Check tire pressure and inflate to recommended PSI. Under-inflated tires develop flat spots during long-term storage.

Clean the battery terminals with a wire brush. Disconnect the negative cable. Connect a battery tender/trickle charger and leave it connected all winter.

Wash the exterior. Touch up paint chips. Wipe down all surfaces and lubricate any exposed metal with a light oil or WD-40.

Store in a dry, covered space. If stored outdoors, use a quality, fitted cover.