March 1, 2016

Grass line trimmer maintenance checklist

By Sears PartsDirect staff
Grass line trimmer maintenance checklist.

Because your grass line trimmer is a relatively simple tool, you might forget that it needs routine maintenance just like your other lawn tools. Taking a few basic steps goes a long way toward keeping your trimmer ready.

If you're having trouble with your line trimmer, check out our line trimmer repair help. We also have line trimmer parts you might need.

Hang a calendar in your garage or storage shed so you can easily keep track of when you use your line trimmer and for how long. Refer to the owner's manual for recommended maintenance intervals. Here are typical guidelines.

At the start of each season

Put fresh fuel into a gas-powered trimmer and check the cords on an electric trimmer.

Replace the trimmer line, too. Old line can become brittle and break easily.

Before each use

if you have a gas-powered grass trimmer, fill the tank with the gas–oil mix recommended in the owner's manual; 40 parts unleaded gasoline to one part 2-cycle engine oil is typical. If you have an electric trimmer, check the cords. 

Make sure you have plenty of replacement trimmer line on hand. If you're using a blade, inspect it carefully and replace it if it's bent or broken.

After each use

Let your trimmer cool for several minutes (if it's electric, unplug it) and then use a soft brush and cloth to remove grass clippings, dirt and other debris. Pay special attention to clearing the air intake vents on gasoline-powered trimmers.

Refill the trimmer head with line if it's running low, so you won't run out in the middle of your next trimming session.

Inspect the trimmer for loose or damaged parts and repair them before you put the machine away.

After every 10 hours of use

Clean your trimmer's air filter to ensure efficient engine performance. Wash the filter in detergent and water, then rinse it and let it dry. Work a few drops of oil into the clean, dry filter if recommended for your trimmer, and then reinsert it.

After every 25 hours of use

Remove and inspect the spark plug on a gas-powered trimmer. Clean or replace it if it's dirty.

Before storing for the winter

Before you put your trimmer away for the season, give it a thorough cleaning and lightly oil the metal surfaces to prevent rust.

If you have a gas-powered trimmer, either empty or stabilize any fuel remaining in your trimmer. To get rid of the fuel, drain the tank into a US Department of Transportation-approved gas can, then start the engine and let the machine run until it stops on its own. To store your trimmer with a full tank, add a fuel stabilizer to the gasoline–oil mix in your gas can, shake it, and use the new mixture to top off your trimmer's tank. Run the engine for about 5 minutes to circulate the treated fuel through the engine. If you already use a 2-cycle engine oil formulated with a stabilizer, you don't need to add stabilizer.

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carburetor
Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings
Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank
Repair guides for gas line trimmers

These step-by-step repair guides will help you safely fix what’s broken on your grass line trimmer.

October 1, 2013
By Lyle Weischwill
How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these instructions to replace the carburetor in under 30 minutes.

Repair difficulty
Time required
 30 minutes or less
October 1, 2013
By Lyle Weischwill
How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these instructions to do the job in under 30 minutes.

Repair difficulty
Time required
 30 minutes or less
October 1, 2013
By Lyle Weischwill
How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yourself, following these instructions.

Repair difficulty
Time required
 30 minutes or less
Articles and videos for gas line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

June 1, 2015
How to tune up a grass line trimmer video
By Sears PartsDirect staff

Tune of your grass line trimmer, following the steps in this video.

June 1, 2015
How to replace a line trimmer fuel line video
By Sears PartsDirect staff

Follow the steps in this video to replace a leaking fuel line in a line trimmer.

March 1, 2015
Grass line trimmer common questions
By Sears PartsDirect staff

From what kind of fuel to use to why your gas line trimmer won't start, here are the questions our experts hear most often about grass line trimmers.