Finishing the mowing season with a little maintenance can prevent hard starting, corrosion, belt damage, flat tires, and avoidable repairs when the mower returns to service. Use this checklist before storing a walk-behind mower, lawn tractor, or zero-turn mower for an extended period.
Always follow the service and storage instructions in your equipment manual. Park on a flat surface, set the parking brake, remove the key, allow the engine and exhaust to cool, and disconnect the spark-plug wire before working near the blade or other moving parts. Remove the battery pack from cordless equipment.
1. Record the equipment information first
Before ordering maintenance parts, photograph the model-and-serial label and write down any OEM numbers printed on the old filter, belt, blade, spark plug, or transmission. Similar-looking parts can have different dimensions, mounting patterns, or electrical specifications.
- Record the complete mower model and serial number.
- Record the engine model, type, and code when shown.
- Match the full OEM part number—not appearance alone.
- Check any model-year or serial-range notes in the parts diagram.
2. Clean the mower before storage
Remove dry grass, leaves, and debris from the deck, cooling screens, belt covers, engine shrouds, and transmission area. Packed debris holds moisture and can restrict cooling. Avoid directing high-pressure water toward bearings, electrical connectors, seals, or the air intake. Let the mower dry completely before storage.
3. Inspect the blade and deck
Look for bent blades, deep nicks, cracks, excessive wear, loose hardware, damaged baffles, and corrosion. A blade that is cracked, bent, or worn beyond the manufacturer’s limit should be replaced rather than repaired. If a blade is removed for sharpening, preserve its cutting orientation and verify that it is balanced before reinstalling it. Tighten blade hardware to the equipment manufacturer’s torque specification.
When selecting a replacement, confirm blade length, center-hole style, outer-hole spacing, lift profile, rotation, deck size, and OEM cross-reference. “Fits a 42-inch deck” is not enough by itself because one deck may use several different blade designs.
4. Check belts, pulleys, and spindles
Inspect deck and drive belts for cracking, glazing, frayed edges, missing chunks, or signs that the belt has been rubbing a guard. Rotate accessible pulleys by hand with the mower safely disabled. Roughness, wobble, excessive play, or grinding may point to a worn pulley or spindle bearing. Confirm the belt-routing diagram before removing a belt and take a reference photo of the original routing.
5. Service the engine according to the manual
Follow the engine manufacturer’s specified oil type, capacity, filter, spark plug, and service interval. Do not rely on engine horsepower alone when choosing parts.
- Change the oil and oil filter when the manual calls for it.
- Inspect the air filter and replace it if it is damaged, oil-soaked, or too dirty to service.
- Inspect the spark plug and confirm the correct part number and gap before installation.
- Clean debris from engine cooling fins and intake screens without damaging them.
Browse Filters & Tune-Up parts, then verify the mower and engine information listed on the product page before ordering.
6. Prepare the fuel system
Use the storage method specified by the engine manufacturer. Depending on the equipment, that may involve using fresh fuel with the correct stabilizer or safely draining the fuel system. Never drain gasoline near a flame, heater, appliance pilot light, or other ignition source, and never run an engine indoors.
7. Inspect tires and wheels
Check tire pressure against the mower label or owner’s manual, not the maximum pressure molded into the tire unless the manufacturer specifically directs otherwise. Look for weather cracking, punctures, uneven wear, bent rims, loose wheel hardware, and worn bushings or bearings. When replacing a tire-and-wheel assembly, confirm tire size, rim diameter and width, hub length, axle or bearing diameter, offset, tread, and load rating.
Browse Lawn Mower Tire & Wheel Assemblies and compare every listed measurement to the original assembly.
8. Check the battery and electrical system
Clean corrosion from battery terminals using the procedure in the manual, inspect cables for damage, and charge or store the battery as the manufacturer recommends. Keep removed batteries in a dry location away from metal objects and extreme temperatures. For cordless mowers, follow the battery manufacturer’s storage-charge and temperature guidance.
9. Inspect hydrostatic-drive components
Check for fresh oil residue, damaged cooling fans, loose linkage, abnormal noise, or reduced drive performance. Do not assume two transaxles from the same family are interchangeable. The full Hydro-Gear, Tuff Torq, or equipment-manufacturer identification number is essential because shaft, linkage, brake, fan, and left/right configurations can differ.
10. Store the mower safely
Store the mower clean and dry in a ventilated area away from ignition sources. Lower attachments when appropriate, remove the key, and keep the machine protected from rain and standing moisture. Do not cover a warm mower or use a cover that traps condensation.
Fall mower maintenance checklist
- Model, serial, engine, and OEM part numbers recorded
- Deck, cooling screens, and transmission area cleaned
- Blade, belt, pulleys, and spindles inspected
- Oil, filter, air filter, and spark plug checked per the manual
- Fuel system prepared for storage
- Tires, wheels, bearings, and pressure checked
- Battery serviced and stored correctly
- Hydrostatic-drive area checked for leaks or damage
- Mower stored clean, dry, cool, and secure
Need help confirming a part?
Send MowForge Supply the equipment model and serial number, engine identification, and the complete number from the original part. Clear photos of the equipment label and old part can also help prevent an incorrect order.