Lawn-Boy
Gas Walk-Behind Mower

Model #10202-3900001 AND UP Official Lawn-Boy lawn mower

Here are the diagrams and repair parts for Lawn-Boy 10202-3900001-AND-UP lawn mower, as well as links to manuals and error code tables, if available.

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

    Showing 10 of 122 parts

    Lawn Mower Recoil Starter Rope Guide#2

    Handle assembly Diagram

    Rope guide

    Part #92-1021
    Replaced by #86-9671
    ?
    Manufacturer substitution
    This part replaces 92-1021. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $7.09 | 
    12% OFF 
    Phone Price: $8.09
    Lawn Mower Shoulder Bolt#17

    Deck & wheel assembly (hand push) Diagram

    Shoulder bolt

    Part #614650
    Replaced by #614650
    ?
    Manufacturer substitution
    This part replaces 614650. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $3.84
    Lawn Mower Wheel Assembly

    See All Related Diagrams

    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
    In Stock
    $41.79 | 
    11% OFF 
    Phone Price: $46.79
    Lawn Mower Handle Knob#10

    Handle assembly Diagram

    Knob

    Part #614243
    Replaced by #98-7134
    ?
    Manufacturer substitution
    This part replaces 614243. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.22
    Lawn Mower Washer Clutch#12

    Rear axle assembly Diagram

    Washer

    Part #65-4760
    Replaced by #65-4760
    ?
    Manufacturer substitution
    This part replaces 65-4760. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Knob Cover

    See All Related Diagrams

    Knob

    Part #614682
    Replaced by #98-8332
    ?
    Manufacturer substitution
    This part replaces 614682. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.89
    Pin-groove#8

    Gear case assembly Diagram

    Pin

    Part #3285-19
    Replaced by #3285-19
    ?
    Manufacturer substitution
    This part replaces 3285-19. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Drive Cover#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
    $29.49
    Gear Cover#2

    Gear case assembly Diagram

    Gear cover

    Part #614668
    Replaced by #614668-03
    ?
    Manufacturer substitution
    This part replaces 614668. Substitute parts can look different from the original.
    In Stock
    $8.69
    Gear Case A#16

    Deck & wheel assembly (self propelled) Diagram

    Gear case a

    Part #684766
    Replaced by #684766
    ?
    Manufacturer substitution
    This part replaces 684766. Substitute parts can look different from the original.
    In Stock
    $727.55

    Symptoms for gas walk-behind mowers

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

    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: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent
    Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
    Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
    Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

    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.

    March 1, 2016
    By Lyle Weischwill
    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 ignition coil on an OHV engine

    Replace the ignition coil if it isn't sending electric current to the spark plug when you pull the recoil starter rope.

    Repair difficulty
    Time required
     30 minutes or less
    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 replace this tiny but essential part.

    Repair difficulty
    Time required
     45 minutes or less

    Articles and videos common to all walk-behind mowers

    Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

    August 30, 2022

    How to enjoy all the online benefits we offer on our Sears PartsDirect website

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

    August 5, 2022

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

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

    June 29, 2022

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