MTD 31AH65FH700 snow thrower Parts

To tell what year your MTD snowblower was built, we use the serial number on the machine, not the model number. On many MTD units (including model 31AH65FH700), the serial number format encodes the build date; the most reliable method is to match your serial number pattern to the decoding chart in the 31AH65FH700 owner's manual.

Where to find the serial number

Look for a label or stamped tag on the snow thrower:

• On the frame near the engine or recoil starter area
• On the rear of the housing near the handles
• Near the axle area or side panel
• Sometimes on an engine label (engine serial is different from the unit serial)

How to decode the year (practical approach)

MTD has used more than one serial-number format over the years, so we decode it by pattern.

• Write down the full serial number exactly as shown (letters and numbers)
• Count the characters (common formats are 11 characters, but other lengths exist)
• If your serial number includes a clear date-style sequence, use that to identify the build date
• If your serial number uses a single “year digit” within the string, that digit gives the year within a decade; you confirm the decade by the machine’s features and approximate age

Quick pattern guide

What you see on the serial label	What it usually means	What to do next
A longer serial with a date-like sequence	Often includes month/day/year info	Decode using the manual chart
An 11-character serial with a “year digit” position	Year is encoded as one digit	Use the manual chart, then confirm decade
Only an engine serial is readable	Engine date may not equal machine build date	Find the unit/frame serial label

Why it matters

Knowing the build year helps you choose the correct replacement parts and service procedures for wear items like belts, skid shoes, and shave plates. It also helps when you are matching assemblies such as a gearbox or auger housing to your exact configuration.

Related maintenance tip while you are checking labels

If you are already inspecting the machine, it is a good time to check common wear parts:

• Inspect the auger drive belt for cracking or glazing
• Check shear pins for damage or missing hardware
• Verify clutch cables move freely and return fully

Last updated: February 2026

For the MTD snow thrower model 31AH65FH700, the correct fuel depends on whether your engine is 2-cycle or 4-cycle: 2-cycle engines use a gas and 2-cycle oil mix (commonly 50:1), while 4-cycle engines use straight gasoline (oil goes in the crankcase, not the fuel). Confirm your engine type in the owner's manual.

Quick fuel mix guide

Use this as a fast reference before you fill the tank.

Engine type	What goes in the fuel tank	Typical ratio	Notes
2-cycle (2-stroke)	Gasoline + 2-cycle oil	50:1	Oil is mixed into the gas
4-cycle (4-stroke)	Straight gasoline	None	Engine oil is filled separately

If your snowblower is 2-cycle (50:1)

A 50:1 mix means 2.5 oz of 2-cycle oil per 1 gallon of gasoline.

• Use fresh, clean gasoline
• Use oil labeled for 2-cycle/2-stroke engines
• Mix in an approved fuel container first (do not mix in the tank)
• Shake the container to blend, then fill the tank
• Only mix what you will use soon; old fuel causes hard starting and poor performance

If your snowblower is 4-cycle

With a 4-cycle engine, you do not add oil to the gasoline.

• Fill the fuel tank with straight gasoline
• Check engine oil level before each use
• Change oil on schedule to protect the engine (especially for cold-weather operation)

Why it matters

Using the wrong fuel setup is one of the fastest ways to create starting problems, heavy smoke, plug fouling, or internal engine damage. Getting the mix right also helps your auger and drive systems perform consistently under load.

Last updated: February 2026

The MTD snow thrower model 31AH65FH700 has an Average Useful Life of 7 years or 60 hours of operation. After that point, we recommend having the machine inspected annually and staying current on routine maintenance listed in the 31AH65FH700 owner's manual.

What “average useful life” means

This is a benchmark for typical homeowner use. It is not a warranty length; it is a practical service-life guideline tied to wear, maintenance, and operating conditions.

What counts toward the 60 hours:

• Actual engine run time while clearing snow
• Warm-up and idle time during use
• Multiple short sessions that add up over a season
• Heavy, wet snow use (often increases wear)

Maintenance that helps you reach (and often exceed) the average

Keeping wear parts fresh and adjustments correct has the biggest impact on longevity.

• Inspect belts and replace if glazed, cracked, or slipping
• Check shear pins and replace after an impact to protect the gearbox
• Inspect cables for stretching, fraying, or poor engagement
• Check skid shoes and shave plate for uneven wear
• Use proper off-season storage steps (including clearing snow from the auger/impeller area)

Common wear items you may replace over time

Wear item	What you notice	Example part for this model
Auger drive belt	Auger slows, squeals, poor throwing	Snowblower auger drive belt 256963
Skid shoes / shave plate	Scraping, poor scraper contact, uneven clearing	Skid shoe, shave plate (see parts list)
Shear pins	Auger stops after hitting ice or debris	Shear pin (see parts list)

Why it matters

Knowing the 7-year or 60-hour guideline helps you plan preventive maintenance and budget for normal wear parts (belts, skid shoes, shave plates, shear pins) before a mid-storm breakdown.

Last updated: March 2026