Craftsman
Walk-Behind Mower

Model # 3901 Official Craftsman lawn mower

Here are the diagrams and repair parts for Official Craftsman 3901 lawn mower, 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 357 parts  |

Knob 12681-6167-0
#130

Recoil starter diagram

Knob

Part #12681-6167-0

Replaced by #31-904

?
Manufacturer substitution
This part replaces 12681-6167-0. Substitute parts can look different from the original.
This item is not returnable
In Stock
Shim 12681-1666-0
#200D

Rocker arm - camshaft diagram

Shim

Part #12681-1666-0

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

Mark 65642-5613-0
#40

Grass catcher bag - label diagram

Mark

Part #65642-5613-0

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

Screw 13181-4422-0
#40

Carburetor (component parts) diagram

Screw

Part #13181-4422-0

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

Spring 65661-4217-0
#60

Cable - lever diagram

Spring

Part #65661-4217-0

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

Turbo Fan 65601-3710-0
#10

Turbofan - blade diagram

Turbo fan

Part #65601-3710-0

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

Shield 65661-2154-0
#140

Joint cover - discharge guard diagram

Shield

Part #65661-2154-0

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

H0lder Rh 65601-4112-5
#50

Handle diagram

H0lder rh

Part #65601-4112-5

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

Cir-clip 04613-0005-0
#180

Governor diagram

Cir-clip

Part #04613-0005-0

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

Weight 12681-6630-0
#120

Rocker arm - camshaft diagram

Weight

Part #12681-6630-0

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

Effective articles & videos to help repair your walk-behind mowers

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.…