Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number

Lawn-Boy 10210-3900001 AND UP lawn mower Parts

Here are the diagrams and repair parts for Lawn-Boy 10210-3900001 AND UP lawn mower, as well as links to manuals and error code tables, if available.

Lawn-Boy 10210-3900001 AND UP lawn mower
By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for 10210-3900001 AND UP Walk-Behind Mowers

  • Toro Grommet for Lawn-Boy 10210-3900001 AND UP - Part 94-1610

    Grommet

    Part #604604

    Replaced by #94-1610

    Info Icon
    Manufacturer substitution
    This part replaces 604604. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Minus Item
    Qty
    Plus Item
  • Toro Nut for Lawn-Boy 10210-3900001 AND UP - Part 3296-39

    Deck & wheel assembly (hand push) diagram

    Nut

    Part #3296-39

    Replaced by #3296-39

    Info Icon
    Manufacturer substitution
    This part replaces 3296-39. Substitute parts can look different from the original.
    In Stock
    $28.46
    Minus Item
    Qty
    Plus Item
  • Toro Lawn Mower Nut for Lawn-Boy 10210-3900001 AND UP - Part 3296-5

    Gear case assembly diagram

    Nut

    Part #3296-5

    Replaced by #3296-5

    Info Icon
    Manufacturer substitution
    This part replaces 3296-5. Substitute parts can look different from the original.
    In Stock
    $29.84
    Minus Item
    Qty
    Plus Item
  • Toro Actuator Plate for Lawn-Boy 10210-3900001 AND UP - Part 92-1052

    Deck & wheel assembly (self propelled) diagram

    Actuator Plate

    Part #92-1052

    Replaced by #92-1052

    Info Icon
    Manufacturer substitution
    This part replaces 92-1052. Substitute parts can look different from the original.
    In Stock
    $26.51
    Minus Item
    Qty
    Plus Item
  • Toro Stop Rope for Lawn-Boy 10210-3900001 AND UP - Part 2210-316

    4 cycle engine, fuel tank & blade assembly diagram

    Rope Stop

    Part #92-1701

    Replaced by #2210-316

    Info Icon
    Manufacturer substitution
    This part replaces 92-1701. Substitute parts can look different from the original.
    In Stock
    $38.47
    Minus Item
    Qty
    Plus Item
  • Toro Plate-height Adjustment for Lawn-Boy 10210-3900001 AND UP - Part 92-4881-03

    Plate Ht Aj

    Part #92-4881

    Replaced by #92-4881-03

    Info Icon
    Manufacturer substitution
    This part replaces 92-4881. Substitute parts can look different from the original.
    In Stock
    $49.44
    Minus Item
    Qty
    Plus Item
  • Toro Brake Cable for Lawn-Boy 10210-3900001 AND UP - Part 92-9589

    Handle assembly diagram

    Brake Cable

    Part #92-1044

    Replaced by #92-9589

    Info Icon
    Manufacturer substitution
    This part replaces 92-1044. Substitute parts can look different from the original.
    In Stock
    $202.24
    Minus Item
    Qty
    Plus Item
  • Toro Washer for Lawn-Boy 10210-3900001 AND UP - Part 36-4780

    Gear case assembly diagram

    Washer

    Part #36-4780

    Replaced by #36-4780

    Info Icon
    Manufacturer substitution
    This part replaces 36-4780. Substitute parts can look different from the original.
    In Stock
    $38.69
    Minus Item
    Qty
    Plus Item
  • Toro Decal for Lawn-Boy 10210-3900001 AND UP - Part 65-2690

    4 cycle engine, fuel tank & blade assembly diagram

    Decal

    Part #65-2690

    Replaced by #65-2690

    Info Icon
    Manufacturer substitution
    This part replaces 65-2690. Substitute parts can look different from the original.
    In Stock
    $31.72
    Minus Item
    Qty
    Plus Item
  • Toro Thread Form Screw for Lawn-Boy 10210-3900001 AND UP - Part 92-1616

    Deck & wheel assembly (self propelled) diagram

    Thread Form Screw

    Part #92-1616

    Replaced by #92-1616

    Info Icon
    Manufacturer substitution
    This part replaces 92-1616. Substitute parts can look different from the original.
    In Stock
    $30.75
    Minus Item
    Qty
    Plus Item

Most common symptoms to help you fix your walk-behind mowers

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

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: 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, ba…

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…

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 front deck tray

How to replace a lawn mower front deck tray

Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…

Repair time and Difficulty

 60 minutes or less
How to replace a lawn mower transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…

Repair time and Difficulty

 60 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 time and Difficulty

 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.

The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

Top 10 electric lawn and garden tools

Top 10 electric lawn and garden tools

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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.…

Parts & More

Air Compressor
Dryer
Electric Range
Elliptical Machine
Front-Engine Lawn Tractor
Gas Line Trimmer
Gas Range
Gas Walk-Behind Mower
Lawn & Garden Engine
Microwave/Hood Combo
Parts
Refrigerator
Room Air Conditioner
Top-Mount Refrigerator
Treadmill
Washer