MTD 31AS250-800 snow thrower Parts

Most 30-inch, two-stage gas snowblowers weigh about 250 to 310 lb. For your MTD 31AS250-800 snow thrower, weight varies by engine size, steel thickness, and features (electric start, headlight, power steering), so use that range as a practical expectation.

• Light-duty 30-inch two-stage: ~250 to 270 lb
• Mid-range 30-inch two-stage: ~270 to 295 lb
• Heavy-duty 30-inch two-stage: ~295 to 310+ lb

• Engine displacement and starter system (recoil vs. electric start)
• Auger housing and frame material thickness
• Drive system features (differential, steering assist)
• Tire size and wheel hardware
• Added accessories (drift cutters, skid shoes, scraper bar type)

Weight affects traction, ease of turning, and how well the machine stays planted when chewing through packed snow. Heavier units usually bite better and throw more consistently, but they are harder to maneuver and transport.

• Use the drive system to move it; avoid pushing with the engine off.
• Keep tire pressure even to prevent pulling to one side.
• If it feels hard to roll or self-propel, inspect the drive belt and idler system.
• When servicing belts, use a correct replacement such as the snowblower ground drive belt 754-0367 or snowblower auger drive belt 754-0101A when those match your symptom.

Last updated: February 2026

Most gas snowblowers like the MTD 31AS250-800 typically last 15 to 20 years with normal residential use and consistent maintenance; heavy use, poor storage, and skipped service shorten that lifespan.

We see the biggest lifespan gains from basic upkeep and replacing wear parts before they damage other components.

• Change engine oil on schedule and keep the oil at the correct level
• Use fresh fuel and stabilize fuel before storage
• Keep the auger and chute clear of packed snow and debris
• Lubricate moving points (wheels, auger shaft, and drive components)
• Replace worn belts promptly (auger and ground drive)
• Store it dry; touch up chipped paint to reduce rust on the housing

On the MTD 31AS250-800, these are common “age-related” items that can restore performance when the machine still has plenty of life left:

• Snowblower ground drive belt 754-0367 (loss of drive, slipping, slow movement)
• Snowblower auger drive belt 754-0101A (auger not pulling snow in, weak throwing)
• MTD snowblower scraper blade 731-1033 (poor scraping, leaving snow behind)

A snowblower often feels “worn out” when it really just needs routine service or a few key parts. Keeping belts tight, friction surfaces clean, and the engine maintained helps your MTD snow thrower start easier, throw farther, and drive consistently for many winters.

For step-by-step maintenance that directly supports longer life, use our DIY help like how to change snowblower oil video and how to replace a snowblower belt video.

Last updated: February 2026

Most MTD snow throwers like model 31AS250-800 take about 20 oz (0.6 L) of engine oil when you do a drain-and-refill; we fill to the dipstick mark (not a measured ounce amount) because the exact capacity varies by engine and how completely it drains.

• Park the snowblower on a level surface and let the engine cool.
• Remove the dipstick, wipe it clean, then reinstall it fully.
• Remove it again and read the level; add oil in small amounts.
• Stop when the oil reaches the FULL mark (do not overfill).
• If you accidentally overfill, drain a little oil and recheck.

It is common for the engine to not accept the full bottle amount you expect because some oil remains in the crankcase passages after draining, or the machine is slightly off-level during checking.

Most 4-cycle snowblower engines use SAE 5W-30 for cold-weather operation; synthetic 5W-30 is also commonly used for easier starting in low temperatures.

Running low on oil can damage the engine quickly, and overfilling can cause smoking, fouled spark plug, and hard starting. Filling to the dipstick mark protects the engine and keeps the auger and drive system working reliably.

For step-by-step visuals on routine maintenance, use our DIY video: how to change snowblower oil video.

Last updated: February 2026

A good horsepower range for a residential snowblower like the MTD 31AS250-800 depends on snow depth and how heavy or wet it gets: most homeowners do well with about 5 to 8 HP (roughly 200 to 250cc), while frequent heavy, wet snow and end-of-driveway plow piles typically call for 8 to 11 HP (about 250 to 350cc) in a two-stage machine.

• Small driveway, light snow (up to ~6 inches): 5 to 7 HP (about 150 to 220cc)
• Average driveway, mixed snow (6 to 12 inches): 6 to 9 HP (about 200 to 300cc)
• Heavy, wet snow and plow banks (12+ inches): 8 to 11 HP (about 250 to 350cc)
• Long rural drives or frequent storms: prioritize a larger two-stage unit and traction features over raw HP alone

Horsepower helps, but snow-throwing performance also depends on auger design, impeller speed, and traction. If your machine struggles, it is often a drive or belt issue rather than “not enough HP.”

• Worn or slipping auger belt
• Worn or slipping ground drive belt
• Loose cable adjustment (auger or drive not fully engaging)
• Packed snow or ice in the auger housing
• Shear pins or fasteners damaged or missing

If your MTD 31AS250-800 runs well but does not throw or drive like it used to, these are common wear items to check:

Choosing the right HP (and keeping belts and controls in good shape) prevents clogging, improves throwing distance, and reduces strain on the auger and drive system.

For step-by-step belt guidance, use our DIY help: how to replace a snowblower belt video.

Last updated: February 2026