Western Tool
Gas Walk-Behind Mower

Model # 12860000 Official Western Tool 22" 4-hp self-propelled top bagging rotary mower

Here are the diagrams and repair parts for Official Western Tool 12860000 22" 4-hp self-propelled top bagging rotary mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 159 parts  |

Wing Nut 45576
#21

Throttle control assembly diagram

Wing nut

Part #45576

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

Lock Nut 9413447
#29

Throttle control assembly diagram

Lock nut

Part #9413447

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

Formd Washer 22025
#36

Throttle control assembly diagram

Formd washer

Part #22025

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

Walk-behind Lawn Mower Engine 14442
#18

Engine and mower deck assembly diagram

Walk-behind lawn mower engine

Part #14442

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

Knob 20252
#56

Engine and mower deck assembly diagram

Knob

Part #20252

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

Cap Screw 122052
#28

Throttle control assembly diagram

Cap screw

Part #122052

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

Lock Nut 9424215
#7

Throttle control assembly diagram

Lock nut

Part #9424215

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

Hex Nut 271166
Hex nut

Part #271166

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

Screw 48148
#115

Engine and mower deck assembly diagram

Screw

Part #48148

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

Washer 120392
#6

Engine and mower deck assembly diagram

Washer

Part #120392

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.

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.…