What does neglecting your snow blower cost before winter?
Updated August 2026
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Fuel left sitting in a snow blower through the off-season gums the carburetor, so it will not start the morning the first storm hits, turning a free fall habit into a $75–200 shop carb-clean or a $40 DIY rebuild. Gasoline degrades in a few months, its volatile parts evaporating and leaving a varnish that plugs the carburetor's narrow passages, and a blower that sat all spring and summer full of it is the most common no-start of the season. The frustrating part is the timing, because you discover it in a driveway full of snow, not in October when a shop has an open bench. Here is the neglect ladder from a stabilized tank to a dead machine mid-blizzard.
The escalation ladder
Every row below is the same leak, left a little longer. The top is a cheap warning; the bottom is a claim.
| What happens | Typical bill | How fast |
|---|---|---|
| You stabilize or drain the fuel and test-run it in fall | $0–10, one afternoon | Early fall |
| A DIY carburetor clean and rebuild kit | about $40 in parts | Before the season |
| A shop cleans the gummed carburetor | $75–200 with labor | First-storm no-start |
| Worn belts or shear pins are replaced | $30–100 in parts | Off-season |
| A neglected auger or gearbox fails | $150–400 in repairs | Mid-winter |
| An aging blower is replaced early | $600–1,500 for a new machine | After repeated neglect |
Warning signs
The cruel thing about a snow blower is that the warning comes at the worst time, so the smart move is to force the warning early. Test-run it on a dry fall afternoon, not the night before a blizzard, and the problems announce themselves with weeks to spare. A machine that will not start, starts and dies, or surges and hunts is telling you the carburetor is gummed with old fuel. Belts that squeal or slip and an auger that spins weakly or not at all point to worn belts or a sheared pin. Hard shifting, a grinding gearbox, or oil weeping from the engine are the deeper tells. Better to hear all of this in October than to find it with eight inches on the driveway.
The prevention math
Prevention is nearly free and takes one fall afternoon: drain the fuel or add stabilizer and run it through, change the oil, check the belts and shear pins, and test-run the machine in early fall, against a $75–200 carb job or a mid-storm breakdown. Keep a spare set of shear pins on hand, since they are designed to break when the auger hits an obstruction and you do not want to hunt for a $5 part during a storm. Store the blower dry, and if you must leave fuel in it, use fresh gas with stabilizer and top the tank to limit condensation. Booking the check as a recurring September reminder is what keeps it from slipping to December. The snow blower maintenance checklist and service schedule lay out each step.
Every line in that table starts with a skipped 10-minute task. OnOtto keeps the 10-minute version on your calendar so the $2,000 version never happens.
Get the nudge before the billFrequently asked questions
Is it bad to store a snow blower with gas in it?
It is, unless the gas is stabilized. Fuel left untreated for the months a snow blower sits idle breaks down into varnish and gum that clog the carburetor, the number-one reason these machines will not start when winter arrives. You have two safe options: run the tank dry and let the carburetor empty, or fill with fresh gas, add a fuel stabilizer, and run the engine a few minutes so the treated fuel reaches the carburetor. Leaving a tank of ordinary pump gas to sit all spring and summer is what causes the no-start.
How do I fix a snow blower that won't start after sitting?
Start with fuel and spark. Drain the old gas, put in fresh, and swap the spark plug; if it still will not fire, the carburetor is almost certainly varnished and needs cleaning. A DIY carburetor rebuild kit runs about $40 and an hour or two with basic tools, or a shop will clean it for $75–200. Check the primer bulb and fuel lines for cracks while you are in there. The best fix, of course, is prevention: stabilize or drain the fuel before the machine sits so the carburetor never gums up in the first place.
What are shear pins and why keep spares?
Shear pins are small bolts that connect the auger to its drive shaft and are designed to break on purpose when the auger jams on ice, a rolled-up newspaper, or a chunk of packed snow, sacrificing a cheap pin to protect the expensive gearbox and drive. When one shears, the auger spins freely or stops throwing snow. Replacements cost only a few dollars, but they are exactly the part you cannot easily buy mid-storm, so keep a set in the garage. Use the correct pins for your machine; a hardened bolt defeats the safety and can wreck the gearbox.
When should I service my snow blower each year?
In early fall, well before the first snow. Doing it in September or October gives you time to test-run the machine, have a gummed carburetor cleaned, and replace belts or shear pins while shops are not swamped and parts are in stock. Waiting until the forecast shows snow is how you end up hand-shoveling while the blower sits dead. An annual fall service means fresh oil, a checked or stabilized fuel system, a spark plug, and a look at the belts, augers, and pins. The service interval has the full list.