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Craftsman
Gas Walk-Behind Mower

Model # 917378951 Official Craftsman rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378951 rotary lawn mower, 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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Owner’s manual
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Model diagram and schematic

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ALL PARTS
Showing 10 of 119 parts  |
Lawn Mower Mulching Plug (replaces 133170x479, 150425, 532133170, 532166649, 5321666-49, 702813) 166649
#4

Engine/housing/handle diagram

Lawn mower mulching plug (replaces 133170x479, 150425, 532133170, 532166649, 5321666-49, 702813)

Part #166649

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

Cable Bracket 189925X479
#25

Wheels/tires/bags diagram

Cable bracket

Part #189925X479

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

Lawn Mower Drive Pinion Gear Drive Disc Seal (replaces 175101, 532184172) 184172
#15

Wheels/tires/bags diagram

Lawn mower drive pinion gear drive disc seal (replaces 175101, 532184172)

Part #184172

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

Output Seal 183508
#72

Wheels/tires/bags diagram

Output seal

Part #183508

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

Fuel Stabilizer 33500

#NI04

All parts diagram

Fuel stabilizer

Part #33500

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

Decal 85463
#52

Engine/housing/handle diagram

Decal

Part #85463

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

Gbag.1323125 189679
#54

Wheels/tires/bags diagram

Gbag.1323125

Part #189679

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

Lawn Mower Transmission Assembly 189380
#36

Wheels/tires/bags diagram

Lawn mower transmission assembly

Part #189380

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

Engine, Briggs & Stratton, Model #120k02 N/P
#64

Engine/housing/handle diagram

Engine, briggs & stratton, model #120k02

Part #N/P

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

Baffle 700365X479
#15

Engine/housing/handle diagram

Baffle

Part #700365X479

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

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…

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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 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.…

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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.…

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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.…

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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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