Craftsman
Gas Walk-Behind Mower

Model # 917907751 Official Craftsman 20" rotary lawn mower with rear bagger

Here are the diagrams and repair parts for Official Craftsman 917907751 20" rotary lawn mower with rear bagger, as well as links to manuals and error code tables, if available.

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Showing 10 of 71 parts  |

Decal 78850
#17

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
Hex Screw 650837
#66

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
Selector Knob 77865
#45

Replacement parts diagram

Selector knob

Part #77865

Replaced by #532132800

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Manufacturer substitution
This part replaces 77865. Substitute parts can look different from the original.
This item is not returnable
In Stock
Lock Nut, 1/4-20 STD541425
Lock nut, 1/4-20

Part #STD541425

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

Lock Nut, #10-24 STD541410
#65

Replacement parts diagram

Lock nut, #10-24

Part #STD541410

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

Blade 69229
Blade

Part #69229

Replaced by #145106

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Manufacturer substitution
This part replaces 69229. Substitute parts can look different from the original.
This item is not returnable

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Lock Nut 53838
#61

Replacement parts diagram

Lock nut

Part #53838

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

Shoulder Bolt 84921
#49

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
Lock Nut 74189
#6

Replacement parts diagram

Lock nut

Part #74189

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

Spacer 84920
#46

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
$3.09
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Symptoms for gas walk-behind mowers

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

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

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

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

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

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

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

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 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…

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. …

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…

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.

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

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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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