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Troybilt
Gas Snowblower

Model # 721 Official Troybilt snow thrower

Here are the diagrams and repair parts for Official Troybilt 721 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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ALL PARTS
Showing 10 of 92 parts  |
Washer 710-1005
#35

Wheels/chute/shroud/handle 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
This item is not returnable
$4.91 | 
17% OFF Phone Price : $5.91
In Stock
Knob Wing Nut 720-0284
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
In Stock
Ball Bearing 741-0600
#49

Wheels/chute/shroud/handle diagram

Ball bearing

Part #741-0600

Replaced by #941-0600

?
Manufacturer substitution
This part replaces 741-0600. Substitute parts can look different from the original.
BEST SELLER
$28.71 | 
17% OFF Phone Price : $34.71
In Stock
Yard Machines Lawn & Garden Equipment Bell Washer (replaces 936-0242) 736-0242
Yard machines lawn & garden equipment bell washer (replaces 936-0242)

Part #736-0242

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$6.58 | 
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Extension Cord 629-0071
#1

Engine/gas tank diagram

Extension cord

Part #629-0071

Replaced by #929-0071B

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Manufacturer substitution
This part replaces 629-0071. Substitute parts can look different from the original.
$30.18 | 
17% OFF Phone Price : $36.18
In Stock
Uppper Chute 731-0921
#9

Chute diagram

Uppper chute

Part #731-0921

Replaced by #731-04426C

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Manufacturer substitution
This part replaces 731-0921. Substitute parts can look different from the original.
$26.20 | 
19% OFF Phone Price : $32.20
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Sears Snowblower Chute Flange Keeper Bracket (replaces 706-15718, 731-0851, 784-0851) 731-0851A
#7

Chute diagram

Sears snowblower chute flange keeper bracket (replaces 706-15718, 731-0851, 784-0851)

Part #731-0851A

This item is not returnable
$5.37 | 
16% OFF Phone Price : $6.37
In Stock
Hex Flange 712-3027
Hex flange

Part #712-3027

Replaced by #912-3027

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Manufacturer substitution
This part replaces 712-3027. Substitute parts can look different from the original.
This item is not returnable
$5.44 | 
16% OFF Phone Price : $6.44
In Stock
Ryobi Stop Nut 712-0429
#10

Wheels/chute/shroud/handle diagram

Ryobi stop nut

Part #712-0429

This item is not returnable
$7.06
In Stock
Bushing 741-0475
Bushing

Part #741-0475

Replaced by #941-0475

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Manufacturer substitution
This part replaces 741-0475. Substitute parts can look different from the original.
This item is not returnable
$5.24 | 
16% OFF Phone Price : $6.24
In Stock

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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