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 680540 lawn mower

Lawn-Boy 680540 lawn mower Parts

Here are the diagrams and repair parts for Lawn-Boy 680540 lawn mower, as well as links to manuals and error code tables, if available.

By Schematic
By Part
SELECT DIAGRAM
?

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

Browse Parts for 680540 Walk-Behind Mowers

  • Piston Ring for Lawn-Boy 680540 - Part 682986

    Engine group diagram

    Piston Ring

    Part #682986

    The manufacturer no longer makes this part, and there's no substitute part

  • Cyl & C-case for Lawn-Boy 680540 - Part 683702

    Engine group diagram

    Cyl & C-case

    Part #683702

    The manufacturer no longer makes this part, and there's no substitute part

  • Washer for Lawn-Boy 680540 - Part 146014

    Housing and shroud group diagram

    Washer

    Part #146014

    The manufacturer no longer makes this part, and there's no substitute part

  • Nut for Lawn-Boy 680540 - Part 603773

    Housing and shroud group diagram

    Nut

    Part #603773

    The manufacturer no longer makes this part, and there's no substitute part

  • Gas Line for Lawn-Boy 680540 - Part 612783

    #NI

    All parts diagram

    Gas Line

    Part #612783

    The manufacturer no longer makes this part, and there's no substitute part

  • Rope for Lawn-Boy 680540 - Part 612432

    Starter group diagram

    Rope

    Part #612432

    The manufacturer no longer makes this part, and there's no substitute part

  • Brake Assembly for Lawn-Boy 680540 - Part 682683

    Engine group diagram

    Brake Assembly

    Part #682683

    The manufacturer no longer makes this part, and there's no substitute part

  • Bracket-cd M for Lawn-Boy 680540 - Part 613073

    Engine group diagram

    Bracket-cd M

    Part #613073

    The manufacturer no longer makes this part, and there's no substitute part

  • Piston & Con for Lawn-Boy 680540 - Part 682677

    #NI

    All parts diagram

    Piston & Con

    Part #682677

    The manufacturer no longer makes this part, and there's no substitute part

  • Screw for Lawn-Boy 680540 - Part 610039

    Housing and shroud group diagram

    Screw

    Part #610039

    The manufacturer no longer makes this part, and there's no substitute part

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

Bottom-Mount Refrigerator
Chipper/Shredder
Dishwasher
Front-Engine Lawn Tractor
Gas Snowblower
Lawn Edger
Lawn Sprinkler
Microwave/Hood Combo
Parts
Pressure Cooker
Repair
Riding Mowers & Tractors
Top-Mount Refrigerator
Weight Machine