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Craftsman
Gas Walk-Behind Mower

Model # 917377911 Official Craftsman 21" 6.75-hp rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917377911 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 271 parts  |
Pipe Fitting 132010
#8

Drive assembly 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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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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Lock Nut 83923
#42

Drive assembly 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 & Garden Equipment Screw 851084
#34

Rotary lawn mower diagram

Lawn & garden equipment screw

Part #851084

Replaced by #532435345

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Manufacturer substitution
This part replaces 851084. Substitute parts can look different from the original.
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$3.49 | 
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Lawn & Garden Equipment Washer (replaces 532851074, 5328510-74) 851074
#32

Rotary lawn mower diagram

Lawn & garden equipment washer (replaces 532851074, 5328510-74)

Part #851074

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Nut Lck 5/16 73990500
#11

Rotary lawn mower 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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$2.16
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Lawn Mower Blade Adapter 851514
#30

Rotary lawn mower diagram

Lawn mower blade adapter

Part #851514

Replaced by #581547901

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Manufacturer substitution
This part replaces 851514. Substitute parts can look different from the original.
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Door Assembly 166885
#66

Rotary lawn mower diagram

Door assembly

Part #166885

Replaced by #583702501

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Manufacturer substitution
This part replaces 166885. Substitute parts can look different from the original.
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Lawn Mower Idler Pulley 166043
#64

Rotary lawn mower diagram

Lawn mower idler pulley

Part #166043

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Washer 67725
#30

Drive assembly 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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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 run rough?

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

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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 vibrate a lot?

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

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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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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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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 replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

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Repair difficulty
Time required
 45 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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Learn about a new feature added to the Search Bar on Sears PartsDirect…

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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

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