Last Updated: March 24, 2026
What You’ll Need
- Fresh oil (SAE 5W-30 for most gas snow blowers)
- Fuel stabilizer (Sta-Bil, PRI-G) OR fuel-safe siphon pump
- Fogging oil / engine cylinder treatment (optional but recommended)
- Spark plug socket (5/8″ or 3/4″ typically)
- Clean rags
- Touch-up paint (optional, for rust prevention)
- Light machine oil or WD-40 for moving parts
Safety Precautions
- Work outdoors or in a well-ventilated area for all fuel handling and engine fogging steps.
- Allow the engine to cool completely before changing oil or inspecting the engine compartment.
- Disconnect the spark plug wire before any work near the auger, impeller, or drive mechanisms.
- Wear gloves when handling old engine oil and fuel.
How to Store a Gas Snow Blower (Step-by-Step)
Step 1: Add Fuel Stabilizer or Drain the Fuel Tank
This is the most critical step. You have two options:
- Option A — Add Stabilizer (Easier): Add fuel stabilizer (Sta-Bil at the recommended ratio — typically 1 oz per 2.5 gallons) to the fuel tank. Run the engine for 5–10 minutes to circulate stabilized fuel through the entire fuel system including the carburetor bowl.
- Option B — Drain Completely (Best): Use a fuel siphon pump to remove fuel from the tank. Then run the engine until it stalls to empty the fuel lines and carburetor bowl. This is the preferred method — stabilizer slows degradation but doesn’t prevent it entirely.
Either way, never store a snow blower with untreated gasoline in the tank. Ethanol in E10 fuel absorbs moisture over summer, leading to phase separation and carburetor varnishing — the same issues covered in our ethanol gas problems guide.
Step 2: Change the Engine Oil
Change the oil at the end of the season, not the beginning. Old oil contains combustion byproducts (acids, carbon, moisture) that accelerate internal corrosion during summer storage. Run the engine for 5 minutes to warm the oil first — warm oil drains more completely. Refill with the manufacturer’s recommended oil (typically SAE 5W-30). Most single stage blowers use 20–24 oz; two stage engines use 24–32 oz. Confirm with your owner’s manual.
Step 3: Fog the Cylinder (Optional but Recommended)
Remove the spark plug. Spray 1–2 seconds of fogging oil (or a light coating of clean engine oil) into the spark plug hole. Slowly pull the recoil starter 2–3 times to distribute the oil film on the cylinder walls. Reinstall the spark plug. This prevents cylinder wall rust during summer storage and ensures the engine breaks in cleanly on first fall start.
Step 4: Inspect and Replace the Spark Plug
Inspect the spark plug — if the electrode is worn, carbonized, or the gap is incorrect, replace it now rather than discovering the problem next December. A fresh plug at storage ensures the blower will start easily at the first use. Standard small engine plugs cost $3–$8.
Step 5: Check and Lubricate All Moving Parts
- Auger shaft and drive shaft: Apply grease to auger shaft bearings (if fittings are present) — check your manual for lubrication points.
- Chute rotation mechanism: Apply light machine oil to the chute rotation mechanism and cable connections. Chute controls frequently seize from salt corrosion if not lubricated.
- Skid shoes and scraper bar: Inspect for wear. Replace worn skid shoes before storage so the blower is ready to use without delay next fall.
- Drive belt: Inspect the drive belt for cracks, glazing, or fraying. Replace if worn — belts are $15–$40 and much easier to replace outside the winter season.
Step 6: Clean Exterior and Touch Up Paint
Clean the snow blower exterior with a damp rag, removing all salt, dirt, and ice buildup. Salt accelerates rust — especially around the auger housing and discharge chute. Touch up any paint chips with a rust-preventive spray paint rated for outdoor metal. Lightly oil the auger housing interior if your model uses bare metal (some do, some have powder coat).
Step 7: Store in a Dry, Covered Location
Store the snow blower in a garage, shed, or covered area away from direct moisture. Use a breathable equipment cover — not plastic sheeting, which traps condensation. Store with the auger engaged position released (chute free to rotate) to avoid permanent deformation of the drive mechanism.
For general outdoor equipment storage best practices, see our lawn mower storage guide — many of the same principles apply.
How to Store a Battery Snow Blower
- Charge the battery to 40–60% before storage — not full, not empty. Lithium-ion batteries degrade faster when stored at 100% or 0% charge.
- Remove the battery from the blower and store it indoors at 50–70°F. Never leave batteries in an unheated garage or shed over summer.
- Wipe down the blower body and clean salt and moisture from the auger housing. Lubricate the chute and auger shaft as described above.
- Store the blower and battery separately if possible — this makes it easier to perform battery maintenance over summer without disturbing the stored machine.
Pre-Season Startup Checklist
Before first use next season:
- Check oil level (top off if needed)
- Add fresh fuel (don’t use stored fuel from last season unless it was properly stabilized)
- Check shear bolts — replace any that broke last season
- Test electric start before the first snowfall, not during it
- Set chute rotation — lubricate if stiff
- Confirm battery is charged (battery models)
Frequently Asked Questions
Can I leave gas in a snow blower over summer?
Not safely without stabilizer. E10 pump gas begins degrading in 30 days and causes carburetor varnishing within a few months. Always drain completely or add high-quality stabilizer (Sta-Bil, PRI-G) before summer storage.
Do I need to change the oil every year on a snow blower?
Yes — or at the end of every 25–50 hours of operation, whichever comes first. Most residential snow blower owners fall well within the annual change interval. Fresh oil before storage prevents internal corrosion that causes premature engine wear.
Should I store a snow blower indoors or outdoors?
Indoors is strongly preferred. Outdoor storage under a tarp exposes the machine to moisture cycles that cause corrosion, seizing of moving parts, and fuel system degradation. At minimum, store in a shed with a shed floor — not directly on soil or concrete that contacts groundwater.
What happens if I don’t fog the cylinder?
Light surface rust can form on cylinder walls over a summer without fogging oil. This typically burns off on the first few minutes of running but can cause slightly rough startup and increase initial wear. Fogging is particularly important in humid climates or if the blower is stored in an area that experiences humidity swings.
When should I replace shear bolts?
Replace any shear bolt that has broken during operation before storage. Shear bolts are designed to break when the auger hits a hard object (ice chunk, rock) to protect the drivetrain — running with broken or substituted hardware bolts can result in serious drivetrain damage next season. Have a supply of manufacturer-spec shear bolts on hand before the season starts.
Conclusion
Spending 30 minutes properly storing your snow blower at the end of the season guarantees it starts reliably next winter. The essentials: drain or stabilize the fuel, change the oil, fog the cylinder, lubricate moving parts, and store indoors. The most expensive repair — a carburetor rebuild or replacement — is prevented entirely by proper fuel handling at season end.
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