How to Winterize a Gas Leaf Blower: Step-by-Step Storage Guide

Last updated: October 2026 · Written by the LawnVibe editorial team.

Knowing how to winterize a gas leaf blower saves you a frustrating morning next autumn pulling a starter cord on an engine that will not fire. The short version: deal with the fuel first, by either running the blower dry or filling it with fresh stabilized fuel as your manual recommends, then clean the air filter, inspect the spark plug and fuel lines, clean the housing and store the blower somewhere dry. The whole job takes 20 to 30 minutes and prevents the most common off-season problems, which are almost always fuel-related.

This guide follows small-engine maintenance practice and manufacturer recommendations. Always check your blower's owner's manual for model-specific instructions. If you are shopping for a new blower instead, see our guide to the best gas leaf blower.

Why Winterizing Matters

Gasoline breaks down over weeks and months. As it oxidizes, it forms gum and varnish that can block the tiny fuel passages and jets in a carburetor. Ethanol-blended fuel also absorbs moisture, as the U.S. Department of Energy notes about ethanol blends, which can separate from the gasoline and corrode metal parts. In a 2-cycle blower, stale mixed fuel also loses its ability to lubricate properly. Add dust, sap and debris left in the housing and a dirty air filter, and you have the recipe for a blower that will not start or runs poorly next season. A short end-of-season routine prevents nearly all of these problems.

What You Need

Gather a few basics: a container for draining fuel, fresh fuel stabilizer or ethanol-free pre-mixed fuel, a spark plug wrench, a replacement spark plug if needed, a replacement air filter if needed, a soft brush, a cloth, mild soapy water, gloves and safety glasses. Work outdoors or in a well-ventilated space away from flames and sparks.

Step 1: Decide How to Handle the Fuel

There are two accepted approaches, and your manual should tell you which to use.

Option A: Run it dry. Drain the fuel tank into an approved container, then start the blower and let it run until it stalls from lack of fuel. Restart it until it will not start again. This empties the carburetor so no fuel sits in it over winter. This is the approach many manufacturers recommend for storage longer than a month or two.

Option B: Store with stabilized fuel. Fill the tank with fresh mixed fuel that includes a fuel stabilizer, or with ethanol-free pre-mixed canned fuel, then run the blower for several minutes so treated fuel reaches the carburetor. A full tank limits the air space where condensation can form.

Never leave old, untreated fuel in the tank over winter. If the fuel in your blower is more than a month old, drain it and dispose of it properly at a hazardous waste collection site.

Step 2: Clean or Replace the Air Filter

Remove the air filter cover and take out the filter. Foam filters can usually be washed in warm soapy water, rinsed, squeezed dry and allowed to air dry completely; some manufacturers recommend a light coat of filter oil afterward. Felt or paper filters should be tapped clean or replaced if they are dirty, damaged or oily. A clean filter means the engine breathes freely when you start it next season. Our guide on cleaning a leaf blower air filter has more detail.

Step 3: Inspect the Spark Plug

Let the engine cool completely. Pull off the spark plug boot and remove the plug with a spark plug wrench. A healthy plug has a light tan or gray deposit on the electrode. A black, oily or heavily carbon-fouled plug, or one with a worn electrode, should be replaced with the plug type listed in your manual. Check the gap with a feeler gauge if your manual specifies one. Reinstall the plug finger-tight, then snug it with the wrench, and reconnect the boot.

Step 4: Check the Fuel Filter and Lines

Inside the fuel tank, most blowers have a small fuel filter on the end of the fuel line. Fish it out with a bent wire or hook and inspect it. Replace it if it is discolored or clogged. Check the fuel lines for cracks, stiffness or leaks, since rubber lines can deteriorate with ethanol fuel. Replacing brittle lines before storage prevents leaks and air leaks next season.

Step 5: Clean the Blower Housing and Intake

Remove leaves, dust and debris from the intake screen, the cooling fins and the outside of the housing with a soft brush and a cloth. Do not hose down the engine; water can enter the carburetor and electrical parts. A clean intake and clear cooling fins prevent overheating when the blower runs again.

Step 6: Inspect Tubes, Harness and Fasteners

Check the blower tubes for cracks and make sure they lock together firmly. On backpack models, inspect the harness straps, buckles and padding. Tighten any loose screws and bolts, which vibration can loosen over the season. Replace worn parts now so the blower is ready to go when leaves start falling.

Step 7: Lubricate Where Recommended

Some blowers have throttle cables, pivot points or gearboxes that benefit from light lubrication. Follow the manual; do not oil parts that are designed to run dry. Wipe the throttle trigger and controls so they move freely.

Step 8: Store It Properly

Store the blower in a clean, dry, well-ventilated place such as a shed or garage, away from water heaters, furnaces and open flames. Hang it on a wall hook or place it on a shelf so it is off the floor and protected from moisture and accidental knocks. Cover it loosely with a breathable cloth to keep dust off. Store 4-cycle blowers in the position the manual specifies so oil does not leak into the cylinder.

Storing Fuel Over Winter

If you keep a can of mixed fuel, add stabilizer, seal it tightly and store it in a cool, ventilated area away from living spaces. Even stabilized fuel is best used within a few months, so mixing small batches each season is safer. Many owners find it simpler to buy ethanol-free pre-mixed fuel in sealed cans, which stores much longer. Our guide on the leaf blower fuel mix ratio covers mixing and storage.

Battery Leaf Blowers: Different Winter Steps

If you also own a battery blower, winterizing is simpler. Clean the tool, remove the battery and store it indoors at room temperature, ideally at a partial charge as many manufacturers recommend, rather than fully charged or completely empty. Avoid leaving batteries in freezing garages or hot sheds.

Getting the Blower Ready Next Season

When leaf season returns, inspect the blower again, reinstall the battery or add fresh fuel, check that the air filter and spark plug are in place and prime the engine according to the manual. If you ran the carburetor dry, it may take a few extra pulls to draw fuel back through. If the blower will not start, our guide on fixing a leaf blower that won't start walks through troubleshooting.

Winterizing Checklist

Before you put the blower away, run through this quick checklist: fuel drained and carburetor run dry, or tank filled with fresh stabilized fuel and the engine run for several minutes; air filter cleaned or replaced; spark plug inspected, gapped and reinstalled; fuel filter and lines checked; intake screen and cooling fins cleaned; tubes, harness and fasteners inspected; controls wiped and moving freely; blower stored dry, off the floor and away from heat sources; leftover fuel stabilized or properly disposed of. Keeping a printed checklist in the shed makes the job routine each year.

Ordering Parts Before Next Season

Winter is a good time to order maintenance parts so they are on hand before leaf season: a spare air filter, a spark plug, a fuel filter and a short length of fuel line that matches your model. Having these parts ready means a quick tune-up instead of a trip to the store when the blower misbehaves at the busiest time of year. Note your blower's model and serial number, usually on a label on the engine housing, to order the right parts.

When to Use a Service Center

If your blower ran poorly before storage, smoked heavily, lost power or was hard to start, the off-season is the ideal time for a professional tune-up. A small engine service center can clean or rebuild the carburetor, check compression and adjust the idle and mixture screws, which many newer blowers do not allow owners to adjust. Booking in winter avoids the autumn rush.

Storing Blowers in Cold Climates

In regions with freezing winters, a dry, unheated shed or garage is fine for storage, as long as fuel has been dealt with properly and the blower is protected from moisture. Condensation is the bigger risk than cold itself, so avoid wrapping the blower in plastic, which traps moisture. Bring battery packs indoors, since lithium-ion batteries should not be stored or charged in freezing temperatures.

Using the Blower for Light Snow

Some homeowners keep a gas blower ready through winter to clear light, dry snow from steps, decks and cars. If you plan to do this, skip running it dry; instead keep it filled with fresh stabilized fuel and run it every few weeks. Wear warm gloves, keep the intake clear of snow and let the engine warm up briefly before full throttle. Heavy or wet snow needs a snow blower or shovel.

How Long Winterizing Protects the Engine

A properly winterized blower can sit safely for the whole off-season, typically five to eight months. If storage will run longer, check the blower midway, look for leaks or rodent damage, and refresh stabilized fuel if you chose to store it with fuel in the tank.

Winter Storage Supplies for Gas Blowers

These products support the steps above. Details come from the Amazon listings; we have not hands-on tested them.

Planning a new blower for next season? See our best gas leaf blower picks.

Common Winterizing Mistakes

Common mistakes include leaving old untreated fuel in the tank, adding stabilizer to already stale fuel, forgetting to run the engine after adding stabilizer, storing the blower near a furnace or water heater, washing the engine with a hose, skipping the air filter and storing a 4-cycle blower on its side.

Final Thoughts on How to Winterize a Gas Leaf Blower

Winterizing a gas leaf blower comes down to a short checklist: handle the fuel properly, clean the air filter, inspect the spark plug and fuel lines, clean the housing, tighten fasteners and store the blower somewhere dry. A half-hour of care at the end of the season means your blower should start quickly and run strongly when the leaves fall again.

More Questions People Ask

Should I run my leaf blower out of gas before storing it?

Many manufacturers recommend running the engine dry or draining the tank before long storage, while others recommend filling with stabilized or ethanol-free fuel. Follow your owner manual for your specific model.

Can I leave gas in my leaf blower over winter?

Only if it is treated with stabilizer or is ethanol-free pre-mixed fuel. Untreated pump gas can go stale and gum up the carburetor over a few months.

Where should I store my leaf blower in winter?

Store it in a clean, dry, ventilated place such as a shed or garage, away from open flames, heaters and pilot lights, and out of reach of children.

Do battery leaf blowers need winterizing?

Battery blowers need little engine care, but store batteries indoors at moderate temperatures and at partial charge as the manufacturer recommends.

Frequently Asked Questions