Lawn-Boy
Gas Walk-Behind Mower

Model # 10302-3900001 AND UP Official Lawn-Boy lawn mower

Here are the diagrams and repair parts for Official Lawn-Boy 10302-3900001-AND-UP lawn 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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ALL PARTS
Showing 10 of 122 parts  |

Retaining Ring 65-2720
#10

Rear axle assembly diagram

Retaining ring

Part #65-2720

Replaced by #65-2720

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Manufacturer substitution
This part replaces 65-2720. Substitute parts can look different from the original.
This item is not returnable
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.
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
In Stock
Knob Ht Ajs 92-1008
Knob ht ajs

Part #92-1008

Replaced by #92-1008

?
Manufacturer substitution
This part replaces 92-1008. Substitute parts can look different from the original.
In Stock
Bushing Actuator 614673
#14

Deck & wheel assembly (self propelled) diagram

Bushing actuator

Part #614673

Replaced by #614673

?
Manufacturer substitution
This part replaces 614673. Substitute parts can look different from the original.
In Stock
Anchor S/p 614693
#12

Handle assembly diagram

Anchor s/p

Part #614693

Replaced by #93-7380

?
Manufacturer substitution
This part replaces 614693. Substitute parts can look different from the original.
In Stock
Drive Cover 614671
#9

Deck & wheel assembly (self propelled) diagram

Drive cover

Part #614671

Replaced by #92-8649

?
Manufacturer substitution
This part replaces 614671. Substitute parts can look different from the original.
In Stock
Thrust Washer 36-4791
#5

Gear case assembly diagram

Thrust washer

Part #36-4791

Replaced by #36-4791

?
Manufacturer substitution
This part replaces 36-4791. Substitute parts can look different from the original.
This item is not returnable
In Stock
Shoulder Bolt 614672
Shoulder bolt

Part #614672

Replaced by #614672

?
Manufacturer substitution
This part replaces 614672. Substitute parts can look different from the original.
This item is not returnable
In Stock
Decal Hoc 92-2915
Decal hoc

Part #92-2915

Replaced by #92-2915

?
Manufacturer substitution
This part replaces 92-2915. Substitute parts can look different from the original.
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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

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

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

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…

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

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 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…

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. …

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…

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.

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…

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

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