If your snow blower is running but barely throwing snow, you may also notice weak discharge or snow piling up in front of the machine. A snow blower not throwing snow can result from a clogged chute, broken shear pin, worn belt, or jammed impeller. At BlueStars Parts, you can find helpful guides and replacement parts to restore proper performance.
Quick Diagnosis: Why Isn't Your Snow Blower Throwing Snow?
| Symptom | Likely Cause | Quick Check |
|---|---|---|
| Auger does not spin on a two-stage snow blower | Broken or worn auger belt, jammed auger | Check the belt and auger for jams. |
| Auger spins, but snow does not discharge on a two-stage model | Clogged chute or jammed impeller | Check the chute and impeller. |
| Auger spins, but snow is not thrown far on a two-stage model | Slipping belt, partial blockage, wet snow | Check the chute and belt condition. |
| Rubber paddles spin but do not move snow properly on a single-stage model | Worn paddles or slipping belt | Inspect the paddles and drive belt. |
| Auger suddenly stops spinning after hitting a hard object | Broken shear pin | Inspect the shear pins. |
| Snow blower runs, but the auger turns slowly or intermittently | Loose, stretched, or worn auger belt | Check belt tension and wear. |
1. What's Causing Your Snow Blower Not to Throw Snow?
Several problems can stop a snow blower from moving snow through the chute. The cause often depends on whether the auger, impeller, or paddles are still moving normally.
1.1. Clogged Discharge Chute
Wet, heavy snow can pack tightly inside the discharge chute and block the flow of snow. You may notice the auger still spinning while little or no snow comes out. Ice buildup can also create a partial blockage and reduce throwing distance. Never use your hands to clear a clogged chute. Even after the engine stops, stored tension can cause internal parts to move unexpectedly.
1.2. Broken Shear Pin
On a two-stage snow blower, shear pins connect the auger to the auger shaft. They are designed to break if the auger hits a rock, ice chunk, or other hard object. This helps protect the auger gearbox from more serious damage.
When a shear pin breaks, the shaft may still turn while part of the auger remains stationary. Snow can then pile up in front of the machine instead of moving toward the impeller.
For compatible PowerSmart two-stage snow blowers, including PSSHD24, PSSW24, and DB7651-24, the 303160355P / 303160355 Snow Blower Shear Pins and Nuts are a suitable replacement when the original shear pin breaks or becomes damaged. They replace PowerSmart part numbers 303160355P and 303160355. Confirm your snow blower model and original part number before ordering.
303160355P/303160355 Snow Blower Shear Pins and Nuts (Source: BlueStars Parts)
1.3. Worn, Stretched, or Broken Auger Belt
The auger belt transfers power from the engine to the auger system. Over time, it can stretch, crack, wear down, or lose proper tension. A slipping belt may cause the auger to rotate slowly or intermittently. It can also reduce throwing distance. If the belt breaks completely, the auger may stop turning even though the engine continues to run.
1.4. Frozen or Jammed Impeller (Two-Stage Models)
Two-stage snow blowers use an impeller to push snow from the auger housing through the discharge chute. Wet snow, ice, or debris can freeze or become lodged around this component. When the impeller cannot rotate freely, the auger may still turn while snow fails to discharge properly. The problem is especially common when wet snow freezes inside the machine after use.
Wet snow, ice, or debris can become lodged around the impeller (Source: BlueStars Parts)
1.5. Worn Rubber Paddles (Single-Stage Models)
Single-stage snow blowers use rubber paddles to collect and throw snow. These paddles gradually wear down as they contact the ground during operation.
Worn paddles may still rotate but struggle to pull in and discharge snow effectively. Some models include wear indicators that show when replacement is needed.
For many 21-inch single-stage snow blowers from MTD, Craftsman, Ryobi, Troy-Bilt, Yard-Man, and Yard Machines, especially compatible MTD-built models from 2004 and newer, the 753-04472 / 735-04033 Rubber Paddle Set is a replacement option for worn or damaged paddles. It cross-references part numbers 753-04472, 953-04472, 735-04033, and 735-04032. Verify your machine model and original part number before ordering.
753-04472 / 735-04033 Rubber Paddle Set (Source: BlueStars Parts)
2. How to Troubleshoot a Snow Blower Not Throwing Snow
Before troubleshooting, shut off the snow blower and wait for all moving parts to stop. Remove the ignition key or disconnect the spark plug as recommended in your owner's manual. Never put your hands inside the discharge chute or auger housing.
Step 1: Clear the Discharge Chute Safely
Check the discharge chute for packed snow or ice. Turn off the engine, remove the key, and wait until all moving parts stop before clearing it. Use the machine's clean-out tool or another suitable tool, never your hands.
Step 2: Check the Shear Pins
Inspect the shear pins on both sides of the auger, especially if the machine recently hit a hard object. A missing or broken pin can allow the auger shaft to turn without driving the auger. Replace damaged pins only with the correct shear pins specified for your model.
Inspect the shear pins on both sides of the auger (Source: BlueStars Parts)
Step 3: Inspect the Auger Belt
Check the auger belt for cracks, fraying, excessive looseness, or signs of slipping. A worn or loose belt may make the auger turn slowly or reduce throwing distance. Adjust or replace it according to the manufacturer's instructions.
Step 4: Check the Impeller for Jams (Two-Stage Models)
On a two-stage snow blower, inspect the impeller area for packed snow, ice, or debris. Remove any obstruction only after the engine is off and all moving parts have stopped, following the manufacturer's instructions. If the impeller is frozen, move the machine to a warmer area and allow it to thaw naturally if appropriate for the model.
Inspect the impeller area for packed snow (Source: BlueStars Parts)
Step 5: Inspect the Rubber Paddles (Single-Stage Models)
For a single-stage model, inspect the rubber paddles for excessive wear, cracks, or damage. Check the wear indicator if your model has one. Replace worn paddles when they can no longer contact and move snow effectively.
3. When Should You Call a Professional?
Basic checks can solve many snow-throwing problems. However, call a qualified technician if:
- The snow blower still does not throw snow after clearing the chute and checking the shear pins and belt.
- The auger or impeller remains stuck even after removing visible snow, ice, or debris.
- The machine develops unusual vibration, grinding, or other abnormal noises.
- The auger gearbox, shaft, or impeller appears bent or damaged.
- The auger belt keeps slipping or requires complex adjustment.
- The machine was damaged after hitting a rock, branch, or other hard object.
Basic troubleshooting can help identify snow-throwing problems (Source: BlueStars Parts)
4. How to Prevent Your Snow Blower From Failing to Throw Snow
Regular inspection can help prevent clogs, worn parts, and sudden loss of snow-throwing performance.
- Remove rocks, branches, and other debris from the area before clearing snow.
- Avoid overloading the snow blower with snow faster than it can process.
- Clear packed snow from the chute and auger housing after use, following the manufacturer's safety instructions.
- Let the machine dry before storage to help reduce ice buildup around the auger and impeller.
- Inspect shear pins, belts, and other moving parts regularly for wear or damage.
- Check rubber paddles on single-stage models and replace them when excessively worn.
- Follow the maintenance schedule in your owner's manual.
5. FAQs: Snow Blower Not Throwing Snow
5.1. Why Does the Auger Spin but No Snow Comes Out?
If the auger is spinning but no snow comes out, the discharge chute may be clogged with packed snow or ice. On a two-stage model, a frozen or jammed impeller can also prevent snow from reaching the chute.
5.2. Can I Use a Regular Hardware Bolt Instead of a Shear Pin?
No. If your snow blower is designed to use shear pins, install only the correct type specified for your model. A regular bolt may not break under excessive load and could damage the auger gearbox or other components.
5.3. How Do I Know If My Snow Blower Is Single-Stage or Two-Stage?
A single-stage snow blower typically uses rubber paddles or a rotor to collect and throw snow in one motion. A two-stage model uses a metal auger to collect snow and a separate impeller to discharge it through the chute.
5.4. Is It Safe to Reach Into the Chute If the Engine Is Off?
No. Never put your hands inside a clogged discharge chute, even when the engine is off. Wait for all moving parts to stop and use the snow blower's clean-out tool or another suitable tool instead.
5.5. How Do I Find the Right Shear Pin or Paddle Set for My Snow Blower Model?
Find the model and serial number on your snow blower first. Use those numbers to check the owner's manual, parts diagram, or product fitment information and confirm the correct shear pin or paddle part number before purchasing.
A snow blower not throwing snow can often be caused by a clogged chute, broken shear pin, worn belt, jammed impeller, or worn paddles. Check these components regularly and replace worn parts when needed. For compatible replacements, browse Snow Blower Parts from BlueStars Parts. Always verify your machine model, original part number, and product compatibility before ordering.
Contact Information:
8 The Green, Ste A, Dover, Delaware 19901-3618, United States
Website: https://bluestarsparts.com/
References
Husqvarna. (n.d.). Loss of drive and low snow discharge on a snow blower. https://www.husqvarna.com/uk/support/articles/snow-blower-not-throwing-snow-or-driving-try-these-fixes-ka-70374/
Troy-Bilt. (n.d.). Troubleshooting auger or drive loss on a two-stage snow blower. https://www.troybilt.com/en_US/knowledge-tb-troubleshooting-auger-or-drive-loss-on-a-two-stage-snow-blower.html
Toro. (n.d.). Interactive manual: Clearing a clogged discharge chute. https://manuals.toro.com/217459/index.html
