Snowblower Won’t Blow Snow? Here’s Why and How to Fix It

Your snowblower starts up fine, the engine’s humming, but no snow is flying out the chute. When that happens, it usually means something’s interrupting the process between the auger picking up snow and the impeller throwing it out. Let’s break down the most common causes and how to get things moving again:

If your snowblower won’t blow snow,  it often starts with a clogged discharge chute, especially if you're clearing wet or heavy snow. The moisture can cause snow to pack tightly inside the chute, eventually forming a blockage that stops snow from exiting the machine. 

The best way to handle this is to turn off the blower completely (key out, spark plug wire off), then use a tool or wooden stick to break up and remove the jam. Spraying the chute with a silicone spray before use can help reduce buildup in future snowfalls.

To keep your machine running at its best, it’s also worth checking key components like belts, paddles, and impellers. Snow Blower Parts from AZParts offer reliable replacements designed for various models, helping you maintain optimal performance and avoid further issues during heavy snow clearing.

If the chute is clear but nothing’s turning, it’s time to check the shear pins. These small, often-overlooked components are designed to snap if the auger hits something solid, like a hidden rock or chunk of ice. 

When they break, the auger stops spinning even though the engine keeps running. Fortunately, replacing shear pins is quick and inexpensive. Just make sure you’re using the correct type for your model (never substitute with a standard bolt).

To make that easy, AZParts offers a variety of high quality shear pin replacement kits tailored to the most common snowblower models. For example, if you’re using an AYP, Sears, Craftsman, or Murray machine, the 1501216MA 301172 Shear Pins & Nuts – Pack of 10 is a reliable choice. This set includes compatible parts for model numbers 1501216, 722130, 9524MA, and 301172MA, providing strong, winter-ready performance you can count on.

If your equipment includes Ariens or John Deere models, consider the 52100100 Snow Blower Shear Pins and Nuts – Pack of 10. These pins are engineered for durability and seamless fit, making them perfect for quick, tool-free replacement that keeps your snowblower running through heavy snow without interruption.

For owners of MTD, Cub Cadet, Troy-Bilt, or Craftsman 24" and 26" models, the 20 Pcs 738-04124A Shear Pins & 714-04040 Cotter Pin Set is a great upgrade. Each shear pin in this set is designed to fit precisely and provide long-lasting protection for your auger assembly—ideal for frequent use in tough winter conditions.

Additionally, for routine maintenance and extra protection during winter use, consider the 303160355P Snow Blower Shear Pins and Nuts set. These durable pins are easy to install and help safeguard the auger and transmission on your Powersmart snowblower, ensuring smooth and reliable operation.

Having the right shear pins on hand can be the difference between a short pause and a full snow-day breakdown. Stock up ahead of the season with AZParts.

Another key area to inspect is the auger belt. This belt connects the engine to the auger system, and over time it can loosen, stretch, or wear out.

When that happens, the auger might still move, but too slowly to throw snow effectively, or not at all. Open the belt cover and check for visible wear, cracks, or slack in the belt. If it doesn’t feel tight, you may need to adjust the tension or replace it entirely.

If your snowblower won’t blow snow, sometimes, the problem isn't the belt itself but the auger engagement cable that pulls the belt into action. A stretched or damaged cable can prevent the auger from engaging when you squeeze the handle. Look along the length of the cable and adjust the tension if it feels too loose. If it’s frayed or not responsive, swap it out for a new one.

For a dependable replacement, the 946-0897 Snow Blower Auger Clutch Cable from AZParts is an excellent choice. Designed specifically for MTD, Craftsman, Yard-Man, and Troy-Bilt 2-stage snowblowers, this cable ensures smooth operation and secure engagement. It’s compatible with several OEM part numbers:

Even when all those components are intact, snow may still fail to move if the auger blades or scraper bar are overly worn. On single-stage blowers, rubber paddles act as the main snow pickup tool. When they wear down too far, they no longer contact the ground, and that makes it nearly impossible to grab snow effectively. Two-stage models use metal blades, which can also dull with time. Replacing these parts ensures the blower can lift and push snow efficiently again.

In some cases, snow makes it into the auger housing but never exits through the chute. That usually points to a problem with the impeller, the high-speed fan that launches snow outward. Ice buildup, debris, or internal damage can slow or stop its rotation. Carefully inspect the impeller blades (with the machine turned off) to make sure they spin freely. A jammed or broken impeller may require disassembly or gearbox inspection.

Lastly, don’t overlook engine speed. If the engine isn’t running at full throttle, your auger and impeller may be spinning too slowly to move snow properly. Always run the blower at full speed during use. If the engine still sounds weak, you may need a basic tune up: fresh fuel, clean air filter, and possibly a carburetor cleaning to restore proper power output.

This usually comes down to one of a few mechanical issues. The most common culprits include a clogged discharge chute, worn or broken shear pins, a loose or damaged auger belt, or an impeller jam. If your machine suddenly stops throwing snow mid-operation, it’s often because something got stuck in the chute or the auger hit an object and snapped a shear pin. Stopping the engine and inspecting these areas is the best way to diagnose the issue. Routine maintenance and checking parts for wear before each use can help prevent surprises.

If your snowblower is working but only launching snow a few feet, a few tweaks can help improve performance. First, make sure the engine is running at full throttle, many users unknowingly operate it at half speed. Next, check the condition of the auger blades, impeller, and belt. Worn parts or a slipping belt can reduce throwing distance. Also, clear the chute of any sticky residue or slushy snow that may restrict flow. A chute lubricant spray can help snow slide through more easily. Finally, aim the chute slightly higher—steep angles can reduce how far snow travels.

Yes, but it depends on the type of snowblower and how compacted the snow is. Single-stage models struggle with hard-packed or icy snow since their rubber paddles aren’t strong enough to break it up. Two-stage and three-stage snowblowers are better equipped for tough conditions, thanks to their steel augers and more powerful impellers. For extremely hard or icy snowbanks (like the kind plows leave at the end of driveways), it may help to break up the snow with a shovel first or go slowly in multiple passes to let the auger chew through it without overloading the system.

When your snowblower won’t blow snow, it’s rarely a reason to panic, but it is a signal that something in your machine needs attention. A quick inspection of key components like the chute, auger, belt, and impeller often reveals the issue. With a few simple tools and the right replacement parts, most problems can be solved at home. And when you need reliable, model-specific components fast, AZParts has your back with everything from shear pins to carburetor, so you’re never left stranded in a snowstorm.

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