Part of our complete Small Engine Troubleshooting Guide.
Work through it in this order, because each step rules out the one after it. If your machine will not start in the first place, that is a different list and our guide to a snow blower that will not start covers it. This one is for the machine that runs.
Never put a hand or a foot in the chute or the auger housing. Shut the engine off, pull the key and wait for everything to stop, then use the clean-out tool. A stalled impeller is wound up like a spring, and clearing it by hand lets it turn. This is the injury snow blowers are known for, and the plastic tool clipped to the handle exists precisely because of it.
1. The Chute and the Impeller Housing
Start here, because in Kentucky it is the commonest answer by a wide margin. Our snow is wet and heavy far more often than it is light and dry, and wet snow packs into the impeller housing and the base of the chute until the machine is simply pushing a plug of ice ahead of itself.
With the engine off and the key out, clear the chute and the housing properly with the tool rather than glancing up it. Then take ten minutes before the next storm to spray the housing and the inside of the chute with a silicone or dry lubricant, which is the single best thing you can do to stop it packing again.
2. The Auger Belt
If the housing is clear and the auger still will not do its job, the belt is the next suspect and the likeliest real fault. Belts stretch with age, glaze over from slipping, crack from sitting through two summers, and sometimes jump off a pulley altogether when the auger stops suddenly.
The symptoms sort themselves neatly. An auger that does not move at all usually has a belt off or broken. One that turns slowly, or turns fine in the air and then stops the moment it meets snow, has a belt slipping. A squeal when you engage it says the same thing. Pull the belt cover and look at it, because a glazed, shiny belt will not show its age any other way. Our snow blower service guide covers belt replacement and routing.
3. Shear Pins
Shear pins are the part that confuses people most, because they are meant to break. They hold the auger flights to the shaft, and they are deliberately made weak so that a chunk of ice, a frozen newspaper or the edge of a concrete slab snaps a pin instead of destroying the auger gearbox.
The signature is unmistakable: the shaft turns while one auger flight stands still, or one side throws snow and the other side just rides over it. Fit the correct replacement pin for your machine. Do not substitute an ordinary bolt, however convenient it looks, because a bolt is stronger than the pin and the next impact goes straight into the gearbox, which is the difference between a two-dollar part and a repair worth more than the machine.
4. The Engagement Cable and Idler Pulley
Pulling the auger lever does not grip the belt directly. It moves an idler pulley that tensions the belt against the engine pulley, and the cable between the lever and that pulley stretches over the years exactly like a brake cable.
A stretched cable gives you an auger that engages weakly, or only when you hold the lever hard against its stop, or not at all. Most machines have an adjuster where the cable meets the linkage. While you are in there, spin the idler pulley by hand: a pulley whose bearing has seized or gone rough will not let the belt tension properly and will chew the belt as well.
5. It Throws, But Leaves Snow Behind
This one is not a fault at all, and it is worth separating from the rest. A machine that throws properly and still leaves a flat layer on the driveway is set too high, and the fix is adjustment rather than repair.
The scraper bar across the bottom of the housing wears away over a few winters, and the skid shoes on either side set how far the housing rides above the ground. Lower the shoes for a clean concrete drive, raise them for gravel so the machine is not throwing stones at the garage door, and replace the scraper bar when it has worn back level with the housing.
6. The Gearbox, the Bearings and the Impeller
What is left is mechanical and mostly ours. A worn auger gearbox announces itself with a grinding or knocking note under load, or with noticeable play when you rock an auger flight by hand with the engine off. Bearings and bushings at the ends of the auger shaft wear too, and a loose shaft eats belts.
The other case is impact damage. A machine that has met something solid can end up with a bent auger flight or a bent impeller blade, and either one will throw badly while looking more or less normal. That is a bench job, because an impeller running out of true with a worn clearance to the housing is a job for measurement rather than for guessing.
Matching the Symptom to the Cause
READING THE SYMPTOM
| What It Does | Where to Look First |
|---|---|
| Auger does not move at all | Belt off or broken, then the engagement cable, then the idler pulley. |
| One auger side turns, the other does not | A sheared pin on the stopped side. Fit the correct pin, never a bolt. |
| Throws weakly, or stops in deep snow | Packed impeller housing first, then a glazed belt slipping under load. |
| Throws well but leaves a layer | Skid shoe height and a worn scraper bar. Adjustment, not a fault. |
When to Call the Shop
Clearing a packed chute, lowering a skid shoe, adjusting a cable and fitting a shear pin are all garage jobs, and between them they account for most of the machines that arrive here not throwing. If one of them fixes yours, note which one, because the same fault tends to come back in the same conditions.
Bring it to us when the auger gearbox grinds or has play in it, when a new belt will not hold tension, when the machine has hit something solid, or when the engine will not hold its speed under load — that last one is an engine fault wearing a drive fault's clothes, and our guide to an engine that bogs under load covers it. We will tell you plainly what it needs, and when a machine is not worth the repair we will say that too, with a firm quote before any work begins.
Snow Blower Auger FAQ
The engine runs fine but the auger does not move at all. What is it?
Almost always the auger belt or the engagement cable. Look for a belt off its pulley or glazed, then the cable tension, before anyone suspects the gearbox.
One side of the auger turns and the other does not. Is that serious?
That is a sheared pin on the stopped side, and it is the cheap one. Fit the correct shear pin for the machine, never an ordinary bolt, or the gearbox pays for it next time.
It throws, but only a few feet. Why?
Usually packed snow in the impeller housing or a belt slipping under load. Clear it with the tool, then check the belt and that the engine holds full speed while you work.
Do you service snow blowers in Richmond, KY?
We do, across Madison County. Belts, shear pins, augers and gearboxes, carburetors and electric start, with pickup and delivery available and a firm quote before any work begins: (859) 661-8877.
Blower Not Throwing? Get a Firm Quote First.
Honest diagnosis, fair pricing and fast turnaround from Turf & Trail Small Engine Repair in Richmond, KY. Bring it in before the next storm rather than during it — the week after a snow is the busiest week of our winter. If it will not start at all, that is the other list, and our guide to winterizing a machine properly covers how it got there.
We handle small engine repair of every kind, blade and cutting-edge work and the pickup and delivery in Madison County that means a machine too heavy to lift does not have to be. Serving Richmond, Berea, Waco and Kirksville.
Call (859) 661-8877