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MTD
Gas Snowblower

Model # 31A-2M1A799 Official MTD snow thrower

Here are the diagrams and repair parts for Official MTD 31A-2M1A799 snow thrower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 137 parts  |
Spark Plug 751-10292
#73

Engine diagram

Spark plug

Part #751-10292

Replaced by #951-10292A

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Manufacturer substitution
This part replaces 751-10292. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.88 | 
15% OFF Phone Price : $6.88
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Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18 (replaces 753-05591) 712-04063
Yard machines lawn & garden equipment lock nut, 5/16-18 (replaces 753-05591)

Part #712-04063

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$4.40 | 
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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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$4.49 | 
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Toro Lawn & Garden Equipment Carriage Bolt (replaces 753-08024, 910-0451) 710-0451
#10

Shroud/lower chute/handle diagram

Toro lawn & garden equipment carriage bolt (replaces 753-08024, 910-0451)

Part #710-0451

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$5.42 | 
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Washer 710-1005
#21

Auger and housing/fuel tank diagram

Washer

Part #710-1005

Replaced by #710-0599

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Manufacturer substitution
This part replaces 710-1005. Substitute parts can look different from the original.
BEST SELLER
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$4.91 | 
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Key 731-05632

#NI06

All parts diagram

Key

Part #731-05632

Replaced by #951-10630

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Manufacturer substitution
This part replaces 731-05632. Substitute parts can look different from the original.
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$8.44 | 
11% OFF Phone Price : $9.44
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Knob Wing Nut 720-0284
#7

Shroud/lower chute/handle diagram

Knob wing nut

Part #720-0284

Replaced by #720-04072A

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Manufacturer substitution
This part replaces 720-0284. Substitute parts can look different from the original.
BEST SELLER
$9.33 | 
10% OFF Phone Price : $10.33
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Yard Machines Lawn & Garden Equipment Bell Washer (replaces 936-0242) 736-0242
#14

Auger and housing/fuel tank diagram

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

Part #736-0242

This item is not returnable
$6.58 | 
13% OFF Phone Price : $7.58
In Stock
Sears Lawn Tractor Screw 710-0627
#15

Auger and housing/fuel tank diagram

Sears lawn tractor screw

Part #710-0627

This item is not returnable
$6.47 | 
13% OFF Phone Price : $7.47
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Primer 751-10639
#46

Engine diagram

Primer

Part #751-10639

Replaced by #951-10639A

?
Manufacturer substitution
This part replaces 751-10639. Substitute parts can look different from the original.
$26.71 | 
18% OFF Phone Price : $32.71
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

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Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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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 start?

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

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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 doesn't my snowblower self propel?

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

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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…

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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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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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Repair guides for gas snowblowers

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

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How to replace a snowblower fuel filter

How to replace a snowblower fuel filter

Replace the fuel filter on your snowblower if it's clogged or damaged.…

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Repair difficulty
Time required
 15 minutes or less
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How to replace a snowblower shave plate

Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower chute control gearbox assembly

How to replace a snowblower chute control gearbox assembly

Replace the chute control gearbox on your snowblower if it's stripped or damaged.…

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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

Learn the steps to take to adjust and maintain your snowblower so it lasts longer.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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