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.

By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for
31A-250-800 Snowblowers
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

BEST SELLER
This item is not returnable
$4.52
18% OFF Phone Price : $5.52
Back Order
Yard Machines Lawn & Garden Equipment Nut 712-04064
Yard machines lawn & garden equipment nut

Part #712-04064

BEST SELLER
This item is not returnable
$4.49
18% OFF Phone Price : $5.49
In Stock
Snowblower Ground Drive Belt 754-0367
#16A

Fuel tank/auger diagram

Snowblower ground drive belt

Part #754-0367

Replaced by #954-0367

?
Manufacturer substitution
This part replaces 754-0367. Substitute parts can look different from the original.
BEST SELLER

Get free shipping with Automatic Reorder

$29.91
17% OFF Phone Price : $35.91
In Stock
Knob 720-04072
#10

Chute/handle/shroud diagram

Knob

Part #720-04072

Replaced by #720-04072A

?
Manufacturer substitution
This part replaces 720-04072. Substitute parts can look different from the original.
BEST SELLER
$9.33
10% OFF Phone Price : $10.33
In Stock
Knob Wing Nut 720-0284
#5

Chute/handle/shroud diagram

Knob wing nut

Part #720-0284

Replaced by #720-04072A

?
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
In Stock
Primer 7512B1476
#46

Fuel tank/auger diagram

Primer

Part #7512B1476

Replaced by #570682A

?
Manufacturer substitution
This part replaces 7512B1476. Substitute parts can look different from the original.
BEST SELLER
$11.79
15% OFF Phone Price : $13.79
Back Order
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

This item is not returnable
$6.58
13% OFF Phone Price : $7.58
Back Order
Sears Lawn Tractor Screw 710-0627
#2

Fuel tank/auger diagram

Sears lawn tractor screw

Part #710-0627

This item is not returnable
$6.47
13% OFF Phone Price : $7.47
In Stock
Lawn Tractor Flat Washer 736-0362
#24

Chute/handle/shroud diagram

Lawn tractor flat washer

Part #736-0362

This item is not returnable
$6.87
13% OFF Phone Price : $7.87
In Stock
Aircap Snowblower Scraper Blade (replaces 14240, 706-14240, 731-0722, 731-0778, 731-0812, 7311033) 731-1033
#28

Chute/handle/shroud diagram

Aircap snowblower scraper blade (replaces 14240, 706-14240, 731-0722, 731-0778, 731-0812, 7311033)

Part #731-1033

$58.26
9% OFF Phone Price : $64.26
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

Main causes: punctured tire, damaged rim…

Main causes: dirty carburetor, stale fuel…

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

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

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

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

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

Repair guides for gas snowblowers

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

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.…

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

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.…

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.…

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.

Snowblower won’t start – 4 easy DIY fixes

Snowblower won’t start – 4 easy DIY fixes

Find easy DIY tips to fix your snowblower when it won't start…

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.…

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.…