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Craftsman
Gas Walk-Behind Mower

Model # 3936 Official Craftsman lawn mower

Here are the diagrams and repair parts for Official Craftsman 3936 lawn mower, as well as links to manuals and error code tables, if available.

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  • 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”.

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

Model diagram and schematic

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ALL PARTS
Showing 10 of 213 parts  |
Washer 614426
#19

Rear axle assembly diagram

Washer

Part #614426

Replaced by #614426

?
Manufacturer substitution
This part replaces 614426. Substitute parts can look different from the original.
This item is not returnable
$4.31
In Stock
Screw 614697
#9

Handle assembly diagram

Screw

Part #614697

Replaced by #614697

?
Manufacturer substitution
This part replaces 614697. Substitute parts can look different from the original.
This item is not returnable
$5.29
In Stock
Belt, 21-in 612543
#16

2 cycle engine, fuel tank & blade assembly diagram

Belt, 21-in

Part #612543

Replaced by #612543-03

?
Manufacturer substitution
This part replaces 612543. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$31.17 | 
16% OFF Phone Price : $37.17
In Stock
Wheel Tire 684776
Wheel tire

Part #684776

Replaced by #684776

?
Manufacturer substitution
This part replaces 684776. Substitute parts can look different from the original.
This item is not returnable
$37.96 | 
14% OFF Phone Price : $43.96
In Stock
Pivot Stop 92-5412
#5

Handle assembly diagram

Pivot stop

Part #92-5412

Replaced by #107-0757

?
Manufacturer substitution
This part replaces 92-5412. Substitute parts can look different from the original.
This item is not returnable
$5.89
In Stock
Collar Plate 677525
#19

2 cycle engine, fuel tank & blade assembly diagram

Collar plate

Part #677525

Replaced by #677525

?
Manufacturer substitution
This part replaces 677525. Substitute parts can look different from the original.
$30.89
In Stock
Clip Rope 612824
#4

Handle assembly diagram

Clip rope

Part #612824

Replaced by #612824

?
Manufacturer substitution
This part replaces 612824. Substitute parts can look different from the original.
This item is not returnable
$7.11
In Stock
Housing Assembly 92-4936
#1

Recoil starter assembly diagram

Housing assembly

Part #92-4936

Replaced by #92-4936

?
Manufacturer substitution
This part replaces 92-4936. Substitute parts can look different from the original.
$96.40
In Stock
Throttle Kit 684286

#NI

All parts diagram

Throttle kit

Part #684286

Replaced by #684286

?
Manufacturer substitution
This part replaces 684286. Substitute parts can look different from the original.
$91.51
In Stock
Retaining Ring 303712
#5

2 cycle engine assembly diagram

Retaining ring

Part #303712

Replaced by #303712

?
Manufacturer substitution
This part replaces 303712. Substitute parts can look different from the original.
This item is not returnable
$5.57
In Stock

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.…

Read more
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.…

Read more
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.…

Read more
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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