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Craftsman
Gas Walk-Behind Mower

Model # 917377971 Official Craftsman 21" 6.75-hp rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917377971 21" 6.75-hp rotary lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual
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Model diagram and schematic

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ALL PARTS
Showing 10 of 289 parts  |
Hex Flange Lock Nut 145212
Hex flange lock nut

Part #145212

Replaced by #532409149

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Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
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Pipe Fitting 132010
#8

Wheels/tires diagram

Pipe fitting

Part #132010

Replaced by #532409149

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Manufacturer substitution
This part replaces 132010. Substitute parts can look different from the original.
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Lock Nut 83923
#42

Wheels/tires diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
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Lawn Mower Wheel Dust Cover 88080
#29

Wheels/tires diagram

Lawn mower wheel dust cover

Part #88080

Replaced by #581840401

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Manufacturer substitution
This part replaces 88080. Substitute parts can look different from the original.
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$7.98 | 
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Nut Lck 5/16 73990500
#11

Engine/handle/housing diagram

Nut lck 5/16

Part #73990500

Replaced by #596040501

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Manufacturer substitution
This part replaces 73990500. Substitute parts can look different from the original.
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Husqvarna Lawn Mower 21-in Deck Mulching Blade (replaces 187183, 33273, 33364, 532159267) 159267
#31

Engine/handle/housing diagram

Husqvarna lawn mower 21-in deck mulching blade (replaces 187183, 33273, 33364, 532159267)

Part #159267

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Washer 67725
#30

Wheels/tires diagram

Washer

Part #67725

Replaced by #532067725

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Manufacturer substitution
This part replaces 67725. Substitute parts can look different from the original.
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Washer 52160
#27

Wheels/tires diagram

Washer

Part #52160

Replaced by #596040101

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Manufacturer substitution
This part replaces 52160. Substitute parts can look different from the original.
This item is not returnable
$5.11
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Lawn Mower Wheel, 8 X 2-in (replaces 157178, 180543) 150339
#40

Wheels/tires diagram

Lawn mower wheel, 8 x 2-in (replaces 157178, 180543)

Part #150339

Replaced by #532150339

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Manufacturer substitution
This part replaces 150339. Substitute parts can look different from the original.
$32.98 | 
15% OFF Phone Price : $38.98
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Upstop Bracket 850733X004
#14

Engine/handle/housing diagram

Upstop bracket

Part #850733X004

Replaced by #532850733

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Manufacturer substitution
This part replaces 850733X004. Substitute parts can look different from the original.
This item is not returnable
$8.54
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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Read more

Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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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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Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…

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