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Troybilt 721 snow thrower Parts

Here are the diagrams and repair parts for Troybilt 721 snow thrower, as well as links to manuals and error code tables, if available.

Troybilt 721 snow thrower

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Browse Parts for721 Snowblowers

Wheels/chute/shroud/handle diagram
Flat Washer
Part #736-0108
Replaced by #936-0108
Manufacturer substitution
This part replaces 736-0108. Substitute parts can look different from the original.
This item is not returnable
In Stock
$34.52
Qty
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.
In Stock
$11.23
15% OFF Phone Price : $13.23
Qty
Lock Washer
Part #736-0329
Replaced by #936-0329
Manufacturer substitution
This part replaces 736-0329. Substitute parts can look different from the original.
In Stock
$31.01
Qty
Wheels/chute/shroud/handle diagram
Snowblower Belt Cover
Part #784-5176
Replaced by #790-00045C-0637
Manufacturer substitution
This part replaces 784-5176. Substitute parts can look different from the original.
In Stock
$85.42
7% OFF Phone Price : $91.42
Qty
Screw
Part #710-1003
Replaced by #710-04669
Manufacturer substitution
This part replaces 710-1003. Substitute parts can look different from the original.
This item is not returnable
In Stock
$6.17
14% OFF Phone Price : $7.17
Qty
Wheels/chute/shroud/handle diagram
Cotter Pin
Part #714-0507
Replaced by #914-0507
Manufacturer substitution
This part replaces 714-0507. Substitute parts can look different from the original.
This item is not returnable
In Stock
$8.24
11% OFF Phone Price : $9.24
Qty
Chute diagram
Snowblower Chute
Part #731-0915C
The manufacturer no longer makes this part, and there's no substitute part
Wheels/chute/shroud/handle diagram
Switch Key
Part #725-2018
The manufacturer no longer makes this part, and there's no substitute part
Wheels/chute/shroud/handle diagram
Spark Cap Assembly
Part #684-0190
The manufacturer no longer makes this part, and there's no substitute part
Handle
Part #749-0711A
The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your snowblowers

Choose a symptom to see related snowblower repairs.

Why does my snowblower engine run rough?

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

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...

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...

Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel...

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...

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...

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, ...

Why won't my snowblower chute turn?

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

Repair guides for gas snowblowers

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

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....

Repair time and Difficulty

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....

Repair time and Difficulty

45 minutes or less

How to replace a snowblower 4-way chute control assembly

How to replace a snowblower 4-way chute control assembly

Replace the 4-way chute control assembly on your snowblower if it’s damaged....

Repair time and Difficulty

30 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....