April 19, 2023

Walk-behind mower symptoms

It's difficult to get your mowing done when your lawn mower won't start, runs rough or won't stay running. Our symptoms and troubleshooting tips can help you resolve gas walk-behind lawn mower problems. You can get the repair parts you need by using the search bar at the top of the page. Use our step-by-step walk-behind mower repair guides to help you install parts so you can mow the lawn before the grass grows too tall.

gas walk-behind mower

Symptoms common to all gas walk-behind mowers

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

April 19, 2023

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

April 19, 2023

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

April 19, 2023

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

January 10, 2024

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

January 10, 2024

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

January 10, 2024

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

Articles and videos for gas 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…

How to remove a lawn mower blade using a removal tool

How to remove a lawn mower blade using a removal tool

Learn how a blade removal tool makes replacing the blade easier and safer…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…