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MTD
Gas Snowblower

Model # 31AM32BD799M Official MTD snow thrower

Here are the diagrams and repair parts for Official MTD 31AM32BD799M snow thrower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 108 parts  |
Troybilt Snowblower Shear Pin (replaces 738-04124) 738-04124A
#42

Lower chute/auger/housing diagram

Troybilt snowblower shear pin (replaces 738-04124)

Part #738-04124A

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Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18 (replaces 753-05591) 712-04063
#20

Lower chute/auger/housing diagram

Yard machines lawn & garden equipment lock nut, 5/16-18 (replaces 753-05591)

Part #712-04063

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Yard Machines Lawn & Garden Equipment Nut 712-04064
Yard machines lawn & garden equipment nut

Part #712-04064

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Yard Machines Lawn Tractor Flange Nut (replaces 00012173, Wd-129-103) 712-04065
#21

Lower chute/auger/housing diagram

Yard machines lawn tractor flange nut (replaces 00012173, wd-129-103)

Part #712-04065

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Snowblower Auger Drive Belt, 3/8 X 27-1/8-in (replaces 754-04014, 764-04014, Oem-754-04014) 954-04014
#48

Handles/wheels diagram

Snowblower auger drive belt, 3/8 x 27-1/8-in (replaces 754-04014, 764-04014, oem-754-04014)

Part #954-04014

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Snowblower Ground Drive Belt, 3/8 X 43-3/16-in (replaces 754-04013, Oem-754-04013) 954-04013
#47

Handles/wheels diagram

Snowblower ground drive belt, 3/8 x 43-3/16-in (replaces 754-04013, oem-754-04013)

Part #954-04013

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Knob 720-04072
Knob

Part #720-04072

Replaced by #720-04072A

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Manufacturer substitution
This part replaces 720-04072. Substitute parts can look different from the original.
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Clean-out Tool 731-2643
#14

Lower chute/auger/housing diagram

Clean-out tool

Part #731-2643

Replaced by #931-2643

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Manufacturer substitution
This part replaces 731-2643. Substitute parts can look different from the original.
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Snowblower Flange Bearing 741-0493A
#43

Lower chute/auger/housing diagram

Snowblower flange bearing

Part #741-0493A

Replaced by #741-0493C

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Manufacturer substitution
This part replaces 741-0493A. Substitute parts can look different from the original.
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Yard Machines Lawn & Garden Equipment Bell Washer (replaces 936-0242) 736-0242
#35

Handles/wheels diagram

Yard machines lawn & garden equipment bell washer (replaces 936-0242)

Part #736-0242

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Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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Why doesn't my snowblower self propel?

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

Read more

Why does my snowblower engine run rough?

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

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Why won't my snowblower throw snow far enough?

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

Read more

How do I tune up my snowblower?

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

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Why won't my snowblower chute turn?

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

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Why won't my snowblower start?

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

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Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

Read more

Why won't my snowblower clear snow well?

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

Read more

Why doesn't my snowblower auger turn?

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

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These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

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How to adjust snowblower engine valve lash

How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

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Repair difficulty
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 15 minutes or less
How to replace a snowblower auger drive cable

How to replace a snowblower auger drive cable

A loose or snapped auger drive cable can prevent the auger from rotating. Follow this step-by-step guide to replace the …

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Repair difficulty
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 15 minutes or less
How to replace a snowblower friction disc

How to replace a snowblower friction disc

The friction disc is one of the components of the drive system. If it's worn or damaged, the snowblower won't self-prope…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your snowblowers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

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How to make your snowblower last longer

How to make your snowblower last longer

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