Gas Walk-Behind Mower

Model # 10310-3900001 AND UP Official Lawn-Boy lawn mower

Here are the diagrams and repair parts for Official Lawn-Boy 10310-3900001 AND UP lawn mower, as well as links to manuals and error code tables, if available.

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10310-3900001 AND UP Walk-Behind Mowers
Rope Guide 92-1021
#2

Handle assembly diagram

Rope guide

Part #92-1021

Replaced by #86-9671

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Manufacturer substitution
This part replaces 92-1021. Substitute parts can look different from the original.
This item is not returnable
$5.74
15% OFF Phone Price : $6.74
In Stock
Shoulder Bolt 614650
#17

Deck & wheel assembly (hand push) diagram

Shoulder bolt

Part #614650

Replaced by #614650

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Manufacturer substitution
This part replaces 614650. Substitute parts can look different from the original.
This item is not returnable
In Stock
Screw Engine 92-1624
#9

4 cycle engine, fuel tank & blade assembly diagram

Screw engine

Part #92-1624

Replaced by #95-1726

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Manufacturer substitution
This part replaces 92-1624. Substitute parts can look different from the original.
This item is not returnable
In Stock
Start Handle 612825
#3

Handle assembly diagram

Start handle

Part #612825

Replaced by #81-1630

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Manufacturer substitution
This part replaces 612825. Substitute parts can look different from the original.
In Stock
Upper Handle 614644
#1

Handle assembly diagram

Upper handle

Part #614644

Replaced by #614644

?
Manufacturer substitution
This part replaces 614644. Substitute parts can look different from the original.
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
Hex Screw 146209
Hex screw

Part #146209

Replaced by #146209

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Manufacturer substitution
This part replaces 146209. Substitute parts can look different from the original.
This item is not returnable
$2.85
26% OFF Phone Price : $3.85
In Stock
Bushing 47-2900
#7

Rear axle assembly diagram

Bushing

Part #47-2900

Replaced by #47-2900

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Manufacturer substitution
This part replaces 47-2900. Substitute parts can look different from the original.
In Stock
Ring Tsolat 614443
#1

Rear axle assembly diagram

Ring tsolat

Part #614443

Replaced by #614443

?
Manufacturer substitution
This part replaces 614443. Substitute parts can look different from the original.
In Stock
Traction Cable 92-1041
#8

Handle assembly diagram

Traction cable

Part #92-1041

Replaced by #92-1041

?
Manufacturer substitution
This part replaces 92-1041. 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: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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

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 drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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

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