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MTD 31AM63EF706 snow thrower Parts

Here are the diagrams and repair parts for MTD 31AM63EF706 snow thrower, as well as links to manuals and error code tables, if available.

MTD 31AM63EF706 snow thrower
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Browse Parts for 31AM63EF706 Snowblowers

  • Conn Amp for MTD 31AM63EF706 - Part 729-04035

    #NI01

    All parts diagram

    Conn Amp

    Part #729-04035

    The manufacturer no longer makes this part, and there's no substitute part

  • Torsion Spring, .8156 Id X .3038 for MTD 31AM63EF706 - Part 736-04238

    E/f - style panel diagram

    Torsion Spring, .8156 Id X .3038

    Part #736-04238

    The manufacturer no longer makes this part, and there's no substitute part

  • Cover-gear C for MTD 31AM63EF706 - Part 731-06618

    Extended chute diagram

    Cover-gear C

    Part #731-06618

    The manufacturer no longer makes this part, and there's no substitute part

  • Housing Assembly for MTD 31AM63EF706 - Part 684-04266

    Auger & housing diagram

    Housing Assembly

    Part #684-04266

    The manufacturer no longer makes this part, and there's no substitute part

  • Bracket Panel for MTD 31AM63EF706 - Part 790-00248B

    Bracket Panel

    Part #790-00248B

    The manufacturer no longer makes this part, and there's no substitute part

  • Shaft for MTD 31AM63EF706 - Part 717-04793

    Drive system diagram

    Shaft

    Part #717-04793

    The manufacturer no longer makes this part, and there's no substitute part

  • Snowblower Auger Housing, 30-in for MTD 31AM63EF706 - Part 684-04267

    Auger & housing diagram

    Snowblower Auger Housing, 30-in

    Part #684-04267

    The manufacturer no longer makes this part, and there's no substitute part

  • Gear Assembly for MTD 31AM63EF706 - Part 684-04336A

    Extended chute diagram

    Gear Assembly

    Part #684-04336A

    The manufacturer no longer makes this part, and there's no substitute part

  • Worm Shaft for MTD 31AM63EF706 - Part 917-04636

    Extended chute diagram

    Worm Shaft

    Part #917-04636

    The manufacturer no longer makes this part, and there's no substitute part

  • Snowblower Flange Bearing for MTD 31AM63EF706 - Part 741-04354

    Extended chute diagram

    Snowblower Flange Bearing

    Part #741-04354

    The manufacturer no longer makes this part, and there's no substitute part

MTD Snow Thrower 31AM63EF706 FAQs

The most reliable snowblower brands are the ones with proven long-term parts support and heavy-duty drivetrains; in our experience, Ariens and Toro are consistently strong picks for gas snowblowers, Honda is known for premium durability, and EGO is a top choice for cordless reliability. For your MTD model 31AM63EF706, reliability also depends on keeping wear items like belts and shear pins in good shape.

What “reliable” means for a snowblower

Reliability is usually a mix of build quality and how easy it is to keep the machine running season after season.

  • Starts consistently in cold weather (fuel system and ignition stay healthy)
  • Throws snow without frequent belt slipping or auger issues
  • Has a drivetrain that holds up (friction drive, gears, cables)
  • Uses common wear parts that are easy to replace
  • Has good parts availability over time
Brand reliability at a glance
Brand Best fit Typical strengths Typical tradeoffs
Ariens Two-stage gas Rugged build, strong auger/impeller systems Heavier, often higher cost
Toro Single-stage and two-stage Easy handling, strong performance in many models Some models prioritize convenience over heavy-duty feel
Honda Premium two-stage gas Excellent durability and engineering Higher upfront cost
EGO Cordless electric Low maintenance, easy starting Battery runtime and cold-weather capacity planning
MTD (including many MTD-built variants) Value-focused gas Widely serviceable, common parts Reliability depends heavily on maintenance and timely wear-part replacement
How to make your MTD 31AM63EF706 more reliable

Even a great brand will feel unreliable if common wear parts are stretched, glazed, or out of adjustment.

  • Replace worn auger belts if the auger slows or slips under load (see snowblower auger drive belt 256963)
  • Keep spare shear pins on hand; they protect the gearbox when you hit ice chunks or debris
  • Inspect and adjust clutch/drive cables if engagement feels weak or inconsistent
  • Lubricate key points before and during the season (wheels, hex shaft, auger shaft)
  • Change oil on schedule and check the spark plug before the first storm
Why it matters

Choosing a “reliable brand” helps, but reliability is mostly earned through maintenance and fast replacement of wear items (belts, cables, skid shoes, shave plate). That is what prevents downtime in the middle of a storm.

Last updated: February 2026

To tell how old your MTD snow thrower model 31AM63EF706 is, we use the model and serial number tag on the machine and decode the serial number date code. On many MTD-built units, the serial number includes a build date (often year and week or year and day-of-year).

Where to find the model and serial number

Look for a sticker or metal tag on the snowblower’s main frame. Common locations include:

  • Rear of the frame near the wheels
  • Side of the auger housing (lower front area)
  • Under the handle panel or near the engine mounting area
  • On the chute support area

If the tag is missing or unreadable, the engine itself often has a separate model/type/code label that can help narrow the engine’s build date.

How to decode the serial number (what to look for)

MTD serial formats vary by production run, but these patterns are the most common:

  • Year + week format (example: a year digit followed by a 2-digit week)
  • Year + day-of-year format (example: year digit followed by a 3-digit day)
  • Full year embedded (less common, but some tags include a 4-digit year)
Quick decoding guide (typical patterns)
What you see in the serial number What it usually means What you get
1 digit + 2 digits Year + week of the year Approx build week
1 digit + 3 digits Year + day of the year Approx build date
4-digit year Calendar year Build year
Why it matters

Knowing the build year helps us match the correct parts and revisions for your 31AM63EF706, especially for wear items like belts, cables, and shear pins that can change across production runs.

Parts that commonly match by model and year

When you are ready to maintain or repair the unit, these are common age-related replacements:

  • Snowblower auger drive belt 256963 (part number 954-04050) for auger engagement issues
  • Shear pins (used to protect the auger/gearbox if you hit ice chunks or debris)
  • Skid shoes and shave plate for scraping performance and housing protection
  • Clutch and speed selector cables if controls feel loose or won’t fully engage

For step-by-step help on locating tags and doing basic maintenance, use our DIY guide: how to make your snowblower last longer.

Last updated: February 2026

Yes, you can run 10W-30 in an MTD snow thrower like model 31AM63EF706, but 5W-30 is the better choice for typical snowblower conditions because it flows easier in cold weather and helps with cold starts and fast lubrication.

What changes when you switch from 5W-30 to 10W-30?

The key difference is cold-temperature flow. The lower the first number with the “W”, the easier the oil pumps and splashes around the engine during a cold start.

  • 5W-30: better cold-start protection; preferred for freezing temps
  • 10W-30: thicker when cold; can crank slower and lubricate slower in very cold weather
  • If you store the snowblower in an unheated shed or garage, 5W-30 is the safer everyday pick
  • If you only operate in milder winter temps and store it warm, 10W-30 can work fine
  • Mixing viscosities is not ideal; if you are changing grades, do it at an oil change
Quick guide: which oil should I use?
Your typical conditions Better choice Why
Below freezing most of the time 5W-30 Easier starting and faster lubrication
Around freezing or above 5W-30 or 10W-30 Both can work; 5W-30 still starts easier
Stored in a heated space 10W-30 is acceptable Less cold-start penalty
Hard starting in cold weather 5W-30 Reduces drag during cranking
Best practices when changing oil in a snowblower
  • Check the oil level on a level surface before each use
  • Change oil at least once per season (or every 25 to 50 hours of use)
  • Warm the engine briefly before draining (oil drains more completely)
  • Do not overfill; overfilling can cause smoking and poor running
  • If the engine is hard to start in cold weather, switch back to 5W-30 at the next change
Why it matters

Snowblower engines spend a lot of time starting cold and running in freezing air. Using an oil that flows quickly at startup reduces wear and helps the engine reach stable operation faster.

For more winter maintenance tips that help your machine start and run better, use our guide: how to make your snowblower last longer.

Last updated: February 2026

A gas snowblower typically lasts 10 to 20 years with normal homeowner use and routine maintenance (fresh fuel, annual oil changes, and off-season storage). For your MTD 31AM63EF706 snow thrower, replacing wear items like belts and skid shoes on time is what most often keeps it running longer.

Typical lifespan ranges (what we see most often)
  • Light use (small driveway, a few storms/year): 15 to 20 years
  • Moderate use (regular storms, average driveway): 10 to 15 years
  • Heavy use (long driveway, wet snow, frequent use): 8 to 12 years
  • Commercial or near-commercial use: 5 to 10 years
What shortens lifespan fastest
  • Old fuel left in the tank or carburetor during storage
  • Skipping oil changes or running low on oil
  • Hitting newspapers, ice chunks, or gravel (auger jams and impact damage)
  • Running with loose or glazed belts (slipping creates heat and wear)
  • Letting the scraper and skid shoes wear down until the housing drags
Maintenance that adds years (high impact)
  • Change engine oil at least once per season (more often with heavy use)
  • Use fresh, stabilized fuel and run the engine dry before long storage
  • Inspect and replace shear pins after any auger jam
  • Keep the drive system adjusted and replace worn belts when they slip
  • Lubricate moving points and check fasteners before the first storm
Quick parts-to-symptom guide
Symptom Most common cause What to check/replace
Auger does not spin or slips Worn or stretched auger belt Snowblower auger drive belt 256963
Poor scraping, leaves snow behind Worn shave plate or skid shoes Shave plate, skid shoes
Auger stops suddenly after hitting something Shear pin broken (by design) Shear pins
Why it matters

A snowblower usually “wears out” from neglected fuel and normal wear parts, not from the housing itself. Staying ahead of belts, shear pins, and wear surfaces helps your MTD 31AM63EF706 stay reliable and prevents bigger repairs.

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

Last updated: February 2026

Most common symptoms to help you fix your snowblowers

Choose a symptom to see related snowblower repairs.

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Main causes: dirty carburetor, stale fuel…

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

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