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MTD
Gas Snowblower

Model # 31A-250-800 Official MTD snow thrower

Here are the diagrams and repair parts for Official MTD 31A-250-800 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 83 parts  |
Yard Machines Lawn & Garden Equipment Nut 712-04064
Yard machines lawn & garden equipment nut

Part #712-04064

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Snowblower Ground Drive Belt 754-0367
#16A

Fuel tank/auger diagram

Snowblower ground drive belt

Part #754-0367

Replaced by #954-0367

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Manufacturer substitution
This part replaces 754-0367. Substitute parts can look different from the original.
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$28.51 | 
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Knob 720-04072
#10

Chute/handle/shroud diagram

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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Knob Wing Nut 720-0284
#5

Chute/handle/shroud 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.
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Primer 7512B1476
#46

Fuel tank/auger diagram

Primer

Part #7512B1476

Replaced by #570682A

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Manufacturer substitution
This part replaces 7512B1476. Substitute parts can look different from the original.
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$11.79 | 
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Yard Machines Lawn & Garden Equipment Bell Washer (replaces 936-0242) 736-0242
#10

Fuel tank/auger diagram

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

Part #736-0242

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Ace Lawn & Garden Equipment Push Cap 726-0299
#29

Fuel tank/auger diagram

Ace lawn & garden equipment push cap

Part #726-0299

This item is not returnable
$12.39 | 
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Aircap Lawn Tractor Screw (replaces 150011, 910-0134) 710-0134
#25

Chute/handle/shroud diagram

Aircap lawn tractor screw (replaces 150011, 910-0134)

Part #710-0134

This item is not returnable
$6.55 | 
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Lawn & Garden Equipment Carriage Bolt 710-04071
#2

Chute/handle/shroud diagram

Lawn & garden equipment carriage bolt

Part #710-04071

This item is not returnable
$6.87 | 
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Sears Lawn Mower Roller Wheel 756-0625
#41

Fuel tank/auger diagram

Sears lawn mower roller wheel

Part #756-0625

This item is not returnable
$12.00 | 
14% OFF Phone Price : $14.00
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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 auger turn?

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

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, …

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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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What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim…

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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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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 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 does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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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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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.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to adjust snowblower skid shoes

How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to rebuild a snowblower carburetor

How to rebuild a snowblower carburetor

Rebuild the carburetor on your snowblower if the engine isn't getting fuel.…

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Repair difficulty
Time required
 45 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

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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