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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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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  |
Spark Plug 614008
#4

2 cycle engine assembly diagram

Spark plug

Part #614008

Replaced by #592

?
Manufacturer substitution
This part replaces 614008. Substitute parts can look different from the original.
This item is not returnable
$6.46
In Stock
Retaining Ring 65-2720
#10

Rear axle assembly diagram

Retaining ring

Part #65-2720

Replaced by #65-2720

?
Manufacturer substitution
This part replaces 65-2720. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Spacer 614704
#8

2 cycle engine, fuel tank & blade assembly diagram

Spacer

Part #614704

Replaced by #614704

?
Manufacturer substitution
This part replaces 614704. Substitute parts can look different from the original.
This item is not returnable
$5.57
In Stock
Core Plug 609123
#21

2 cycle engine assembly diagram

Core plug

Part #609123

Replaced by #609123

?
Manufacturer substitution
This part replaces 609123. Substitute parts can look different from the original.
This item is not returnable
$5.26
In Stock
Shield Trai 92-1038
Shield trai

Part #92-1038

Replaced by #92-1038

?
Manufacturer substitution
This part replaces 92-1038. Substitute parts can look different from the original.
$55.60
In Stock
Retainer 610165
#16

2 cycle engine assembly diagram

Retainer

Part #610165

Replaced by #610165

?
Manufacturer substitution
This part replaces 610165. Substitute parts can look different from the original.
$8.26
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
Spring 65-4720
#15

Rear axle assembly diagram

Spring

Part #65-4720

Replaced by #65-4720

?
Manufacturer substitution
This part replaces 65-4720. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Spacer 62-6660
#11

Gear case assembly diagram

Spacer

Part #62-6660

Replaced by #62-6660

?
Manufacturer substitution
This part replaces 62-6660. Substitute parts can look different from the original.
This item is not returnable
$2.20
In Stock
Air Element 614676
#21

2 cycle engine assembly diagram

Air element

Part #614676

Replaced by #614676

?
Manufacturer substitution
This part replaces 614676. Substitute parts can look different from the original.
$12.17
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 run rough?

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

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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 vibrate a lot?

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

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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…

Read more

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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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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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 replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 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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Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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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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