Craftsman
Gas Walk-Behind Mower

Model # 917921441 Official Craftsman 20" rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917921441 20" rotary lawn mower, as well as links to manuals and error code tables, if available.

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Showing 10 of 60 parts  |

Selector Knob 77865
#28

Replacement parts diagram

Selector knob

Part #77865

Replaced by #532701037

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Manufacturer substitution
This part replaces 77865. Substitute parts can look different from the original.
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This item is not returnable
$6.64
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In Stock
Shoulder Bolt 84921
#31

Replacement parts diagram

Shoulder bolt

Part #84921

Replaced by #532174719

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Manufacturer substitution
This part replaces 84921. Substitute parts can look different from the original.
This item is not returnable
In Stock
Handle Knob 63688
#11

Replacement parts diagram

Handle knob

Part #63688

Replaced by #532183724

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Manufacturer substitution
This part replaces 63688. Substitute parts can look different from the original.
This item is not returnable
$11.98
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Washer 61537
#35

Replacement parts diagram

Washer

Part #61537

Replaced by #596134901

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Manufacturer substitution
This part replaces 61537. Substitute parts can look different from the original.
This item is not returnable
$3.98
20% OFF Phone Price : $4.98
In Stock
Lock Nut, #10-24 STD541410
#41

Replacement parts diagram

Lock nut, #10-24

Part #STD541410

The manufacturer no longer makes this part, and there's no substitute part

Hex Screw 650837
#56

Replacement parts diagram

Hex screw

Part #650837

Replaced by #650837

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Manufacturer substitution
This part replaces 650837. Substitute parts can look different from the original.
This item is not returnable
In Stock
Screw 75136
#40

Replacement parts diagram

Screw

Part #75136

The manufacturer no longer makes this part, and there's no substitute part

Lock Nut, 1/4-20 STD541425
#9

Replacement parts diagram

Lock nut, 1/4-20

Part #STD541425

The manufacturer no longer makes this part, and there's no substitute part

Decal 78850
#25

Replacement parts diagram

Decal

Part #78850

Replaced by #539913010

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Manufacturer substitution
This part replaces 78850. Substitute parts can look different from the original.
This item is not returnable
In Stock
Spacer 84920
#29

Replacement parts diagram

Spacer

Part #84920

Replaced by #532401629

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Manufacturer substitution
This part replaces 84920. Substitute parts can look different from the original.
This item is not returnable
$5.31
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Symptoms for gas walk-behind mowers

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

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

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

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

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

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

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

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.

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.…

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.…

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.…

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.

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.…

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.…

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.…