Craftsman
Gas Walk-Behind Mower

Model # 91781320 Official Craftsman 32" rear discharge rotary cutting unit

Here are the diagrams and repair parts for Official Craftsman 91781320 32" rear discharge rotary cutting unit, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 42 parts  |

Screw 17850514
#26

Main frame diagram

Screw

Part #17850514

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

Coupling 786031
#19

Right angle drive diagram

Coupling

Part #786031

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

Mount Brace 625A19
#20

Main frame diagram

Mount brace

Part #625A19

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

Handle Grip 4379H
#11

Main frame diagram

Handle grip

Part #4379H

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

Spring 4366H
#18

Main frame diagram

Spring

Part #4366H

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

Handle 615A20
#12

Main frame diagram

Handle

Part #615A20

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

Snap Ring 788019
#10

Right angle drive diagram

Snap ring

Part #788019

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

Walk-behind Lawn Mower Housing 6102H
#21

Main frame diagram

Walk-behind lawn mower housing

Part #6102H

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

E-ring 98000073
#13

Main frame diagram

E-ring

Part #98000073

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

Blade 6106H
#37

Main frame diagram

Blade

Part #6106H

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

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

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

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

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…

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.…