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Snow Blower Maintenance Tips

29 November 2021

Monnick Supply - Ariens Snow Blower

There's no point in owning a snow blower if it's not being taken care of. Like all outdoor power equipment, snow blowers need to be maintained regularly to continue operating at peak performance and clearing driveways for years to come. Snow blowers that aren't taken care of can lead to expensive repair bills, painful trips to the junkyard and an unnecessary amount of time spent shoveling out from the next snow storm.

Follow the maintenance tips below to keep your shovel in the garage and your snow blower performing as well as it did the first time you used it.

1. Check the Auger

The blades or paddles that rotate inside the snow blower housing are called the augers. Single stage snow blower augers are rubber paddles. These paddles scrape the ground, so unlike two stage snow blowers, they wear. Most rubber paddles have wear indicator holes. When the rubber paddles wear down to the holes, it's time for them to be replaced. Single stage snow blower auger paddles can be easily replaced by anyone with an auger paddle replacement kit and the existing hardware – all it takes are a few minutes and the right sized wrenches.

Two stage augers are connected to auger shafts. It's metal on metal, and because moisture can get between those parts, they have the potential to rust together if they're not maintained. If that happens, the augers can't be separated from the auger shaft if the auger gets damaged and needs replacement. Help prevent the augers from rusting together by regularly pumping grease into the grease fittings or "zerks" on the augers.

2. Replace the Shave Plate

Shave plates, or scraper blades, are attached to the bottom of snow blower housings on both single stage and two stage units to help scrape snow and remove it from clearing surfaces. A snow blower scraper blade needs replacement every few seasons, sometimes more, depending on frequency of use and how much it wears. Scraper blades on single stage snow blowers are usually a plastic or composite material and scraper blades on two stage snow blowers are usually a strong metal, like steel.

Worn scraper blades won't clear snow as well as they did when they were new. Friction between scraper blades and their clearing surfaces causes the blades to wear and leave more snow behind. If you start seeing more snow left behind your snow blower, it's a sign you'll need to adjust your scraper blade. If your scraper blade is adjusted as far down as possible and isn't scraping all the snow from the ground, install a replacement.

3. Examine the Skid Shoes

Two stage snow blowers have a skid shoe on each side of the auger housing to regulate the height of the augers and the scraper blade above clearing surfaces. Like scraper blades on a two stage unit, the steel skid shoes are also made from steel. Though strong, contact by the skid shoes with abrasive clearing surfaces scrapes paint from the shoes, exposing bare metal to moisture, causing rust and corrosion. Skid shoes on Ariens snow blowers can be flipped to the other side, but once both sides wear through, they'll need replacement.

4. Store Extra Shear Pins

Shear pins, also known as shear bolts, secure a two stage snow blower auger to its auger shaft and break if the auger encounters too much resistance. This is by design. Shear bolts are a feature which protect the gearcase if an object stops the auger, such as if a large rock were to become wedged between the augers and the housing. When this happens, the shear bolt breaks or "shears" and the auger shaft continues rotating – preventing the auger gearcase from incurring damage.

Even the smallest and most unexpected objects can cause a shear bolt to break and leave an auger idle, which is why it's important to keep a healthy stock of extra shear pins on hand. When one busts, you can replace it quickly, and continue clearing. Without spares, you're left with an auger that won't turn.

5. Inspecting Snow Blower Belts

Snow blower belt breaks are normal, which is why it's important to frequently check them for signs of wear or damage. If the belt wears through and breaks, it won't damage your unit, but it will leave your snow blower dead in its tracks.

Two stage snow blowers have a belt that controls auger and impeller rotation and another that controls the power assisted wheels. Both belts can be easily accessed by removing the belt cover from the unit so they can be inspected for signs of wear:

Sidewall damage

Snow blower belt edges should be smooth and even throughout the entire length of the belt. If even a small portion of the belt is worn, it's at risk of breaking and should be replaced.

Glazed or burned sidewall

Look at the belt edge that contacts the pulleys. If it appears shiny, glazed or burned, it should be replaced.

Cracking and fraying

If the belt appears brittle or is deteriorating and has cracks, even shallow cracks or fraying, it's at risk of breaking and will need replacement.

Ariens snow blower belt replacements can be completed by anyone with help from the service guide for your unit. A snow blower belt change video for certain Ariens Deluxe and Platinum series models can be found here.

6. Change the Oil

Snow blower oil needs to be changed at least once per season because oil breaks down with each use. Whether your snow blower is used in heavy or light load conditions, its oil will deteriorate and become less effective at protecting its engine. Operating an engine with old oil can lead to engine damage and cause an engine to have a much shorter lifespan than an engine that has had regular oil changes.

Snow blower oil needs to be changed at least once every season, and possibly more frequently if used in areas or conditions where a snow blower is used more. Though it sounds like a burden, oil changes are easy and can be accomplished by anyone with a few hand tools. Start by running the engine for a couple of minutes. This incorporates contaminates that settle to the bottom of the oil system throughout the rest of the oil and warms the oil so it flows better.

7. Snow Blower Lubrication

Snow blowers need to be greased in a few locations to help prevent rusting, parts from seizing and to keep everything moving as designed, season after season. Though single stage snow blowers generally don't have any grease points, there are a few critical areas of a two stage snow blower that need to be lubricated:

The axles

Rust can easily develop on bare metal in moisture-rich environments. At least once per season, remove the wheels from the axles and spread a thin layer of grease or anti-seize compound along the length of the axle shafts. If rust is present on the axles, file it away with sandpaper, wipe clean with a thin layer of oil and then apply lubricant.

The augers

This reiterates what we covered in the auger section near the top, but again, metal on metal can cause issues, so grease the auger shafts.

The tractor

A few drive gears, a shaft or two and sometimes a chain inside the tractor (the box to which the engine is mounted to) all need to be greased or oiled to keep a snow blower's wheels turning. Simply tip the unit onto the front of its housing, remove the bottom cover to access the unit's insides and lubricate according to the instructions in your operator's manual.

8. Use Quality Fuel

Not all gasoline is the same. There are different grades, blends and even types of gasoline pumps that can affect snow blower engines. The best gasoline to use in a snow blower is 100% gasoline, however, E10, which is a 10% ethanol / 90% gasoline fuel blend, is technically acceptable for use in snow blower engines.

Fuel is also sensitive and can deteriorate in as little as two weeks from the time it was pumped, which is why it's important to always add a quality fuel stabilizer to help gasoline stay fresh longer between uses. In some areas, snowfall frequencies are unpredictable. You might need a snow blower every two days, or as little as every four weeks. Since gasoline can deteriorate in as little as two weeks from the time it was pumped, it's important to be in the habit of stabilizing the fuel used in your snow blower immediately after it was pumped. Deteriorated fuel can clog your carburetor, your fuel lines and could prevent your engine from starting. If your unit is experiencing starting issues, try draining the fuel system and adding fresh gasoline. If you're still having issues starting your snow blower, we suggest contacting Monnick Supply for diagnosis and repair.

9. Replace the Spark Plug

Do you know what the spark plug does? It's the small mechanism in your engine that creates a spark, igniting the fuel that creates combustion in the engine, which makes the engine work. If your spark plug is "fouled" with oil or carbon deposits, it could prevent a spark from being generated, keeping the engine from starting.

If your snow blower has trouble starting, the spark plug is one of the first places you should look. Remove the spark plug and inspect it for cracks, corrosion or residue build up. If your inspection reveals a dirty or fouled spark plug, you can try cleaning it with a wire brush, or you can replace it for no more than a few dollars. You can also use a spark tester to confirm that your spark plug is working correctly. The spark plug needs to be kept clean and replaced after every 100 hours of use.

For Snow Blower Maintenance Help

If you like to do your own snow blower service, always remember to complete your service according to the instructions outlined in the operator's manual and the engine manual for your unit, and to follow the safety instructions in your manual. If you prefer your local snow blower repair shop do the work, contact Monnick Supply in Marlborough and Framingham.



Marlborough Store

135 Maple Street,
Marlborough, MA
Call (508) 318-4788


Mon-Sat 7:00am to 5:00pm

Framingham Store

759 Waverly Street,
Framingham, MA
Call (508) 386-9876


Mon-Sat 7:00am to 5:00pm

Monnick Supply $$
135 Maple St.
Marlborough MA 01752
United States
(508) 318-4788
Mon-Fri 7am - 6pm
Sat 7am - 5:30pm
Sun 12pm - 4pm
Monnick Supply $$
759 Waverly St.
Framingham MA 01702
United States
(508) 386-9876
Mon-Fri 7am - 6pm
Sat 8am - 5:30pm
Sun 10am - 4pm