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End-of-season mower maintenance is the best time to catch worn parts, fuel problems and deck damage before the machine sits for weeks or months. This checklist applies broadly to riding mowers and zero-turns, but the mower and engine manufacturers' procedures always take priority.
1. Fuel and carburetor
Fuel can deteriorate during storage and leave deposits in the carburetor and fuel system. Follow the engine manufacturer's storage procedure: depending on the engine and fuel system, that may involve properly treated fresh fuel, draining certain components or another specified method. Do not improvise fuel-storage procedures.
If the mower already starts hard, surges or only runs with choke, diagnose it before storage rather than expecting the problem to disappear over winter.
Mower Won’t Start · Carburetor Replacement Guide
2. Oil and filters
Check the engine-hour/service schedule for oil, oil-filter, air-filter and fuel-filter maintenance. Replace only at the interval and with the specification listed for your exact engine. Clean debris around cooling-air inlets before storage.
Shop Filters & Tune-Up Parts →
3. Blades and mower deck
Remove accumulated grass and debris using the procedure approved for your mower. Inspect blades for excessive wear, bends, cracks or impact damage. A damaged blade can create vibration and place additional load on spindles and deck hardware.
Shop Mower Blades → · How to Change Mower Blades
4. Belts, pulleys and spindles
Inspect deck belts for cracking, glazing, fraying and abnormal wear. Check accessible pulleys and spindle assemblies for looseness, roughness or signs of overheating. A belt that repeatedly comes off is usually evidence of another problem.
Shop Belts & Pulleys → · Shop Spindles & Deck Parts →
5. Battery
For electric-start equipment, follow the mower and battery manufacturers' storage instructions. Clean corrosion, verify secure connections and use only a compatible charger or maintainer if the battery maker recommends one. Lithium and lead-acid batteries have different storage requirements.
6. Tires, controls and chassis
Check tire condition and pressure, steering/control movement, visible fasteners, guards and safety equipment. Lubricate only the points and with the lubricant specified in the owner's manual.
7. Store it clean and dry
Allow the mower to dry before storage and keep it in a ventilated location protected from weather. Do not store a machine near ignition sources when fuel is present. Keep rodents from nesting around wiring, filters and cooling areas.
What should you replace before storage?
Replace parts because inspection or the service schedule justifies it—not simply because the season ended. A worn belt, damaged blade, rough spindle or overdue filter is easier to address now than during the first mow next spring.
Related MowForge guides
- Mower deck vibrates when blades are engaged
- Zero-turn maintenance by engine hours
- Why your mower deck belt keeps coming off
- Mower won’t start
Fitment reminder: identify the mower model, engine model and OEM part number whenever possible before ordering. Deck width alone does not guarantee part compatibility.
Safety: Remove the key, disconnect the spark-plug wire(s) as directed, allow hot components to cool and follow the manufacturer’s service procedure before working on the machine.