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Troybilt
Gas Snowblower

Model # 42000 Official Troybilt 21" 5-hp snow thrower

Here are the diagrams and repair parts for Official Troybilt 42000 21" 5-hp snow thrower, as well as links to manuals and error code tables, if available.

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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.

Model diagram and schematic

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ALL PARTS
Showing 10 of 231 parts  |
Valve Stem 1718086
#58

Tractor assembly diagram

Valve stem

Part #1718086

Replaced by #934-0255

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Manufacturer substitution
This part replaces 1718086. Substitute parts can look different from the original.
This item is not returnable
$5.43 | 
16% OFF Phone Price : $6.43
In Stock
Bevel Pinion 778113A
#19

Transmission assembly diagram

Bevel pinion

Part #778113A

Replaced by #778113A

?
Manufacturer substitution
This part replaces 778113A. Substitute parts can look different from the original.
$28.64 | 
17% OFF Phone Price : $34.64
In Stock
Push Cap 1724791
#1

Auger assembly diagram

Push cap

Part #1724791

Replaced by #726-0100

?
Manufacturer substitution
This part replaces 1724791. Substitute parts can look different from the original.
This item is not returnable
$7.43
In Stock
Carrge Bolt 1712059
#39

Auger assembly diagram

Carrge bolt

Part #1712059

Replaced by #710-0260A

?
Manufacturer substitution
This part replaces 1712059. Substitute parts can look different from the original.
This item is not returnable
$6.55 | 
13% OFF Phone Price : $7.55
In Stock
Washer 780072
#29

Transmission assembly diagram

Washer

Part #780072

Replaced by #780072

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Manufacturer substitution
This part replaces 780072. Substitute parts can look different from the original.
This item is not returnable
$3.40 | 
23% OFF Phone Price : $4.40
In Stock
Paint Red 1900706
#200

Tractor assembly diagram

Paint red

Part #1900706

Replaced by #788-0638A

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Manufacturer substitution
This part replaces 1900706. Substitute parts can look different from the original.
This item is not returnable
$32.42
In Stock
Snowblower Drive Sprocket 786047
#20

Transmission assembly diagram

Snowblower drive sprocket

Part #786047

$33.59 | 
15% OFF Phone Price : $39.59
In Stock
Thrust Race 1185815
#15

Gear case assembly diagram

Thrust race

Part #1185815

Replaced by #736-0745

?
Manufacturer substitution
This part replaces 1185815. Substitute parts can look different from the original.
This item is not returnable
$22.29
In Stock
Flange Bushing 780105A
#27

Transmission assembly diagram

Flange bushing

Part #780105A

Replaced by #780105A

?
Manufacturer substitution
This part replaces 780105A. Substitute parts can look different from the original.
This item is not returnable
$8.64 | 
10% OFF Phone Price : $9.64
In Stock
Plug 792074
#45

Transmission assembly diagram

Plug

Part #792074

$26.43
In Stock

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

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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 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 does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel…

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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 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 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 chute turn?

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

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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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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 adjust snowblower engine valve lash

How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

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 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.…

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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

Top questions about Sears and Sears PartsDirect

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

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