Gas Line Trimmer: Why does my gas line trimmer run rough?

If the fuel in your gas line trimmer sits in the tank for months, it can pick up moisture and fail to ignite (that's why you should drain the fuel before storing for the winter or treat the gas with fuel stabilizer before filling the the tank). Replace the fuel with fresh gas if it's old and untreated with stabilizer. You might also need to replace the fuel filter at the same time. Performing preventive maintenance including a line trimmer tune-up will also help the engine run smoothly.

Check the fuel lines for cracks and replace them if necessary. If you still have problems after checking those issues, consider replacing or rebuilding the carburetor.

gas line trimmer

THESE REPAIRS MAY HELP SOLVE YOUR GAS LINE TRIMMER PROBLEM

JC-LT-Replace-the-grass-line-trimmer-fuel-lines

Replace the grass line trimmer fuel lines

Fuel lines become brittle over time and can crack or tear. Replace a fuel line that's brittle or damaged. Be careful to install new fuel lines on the engine the same way the original fuel lines were configured.

Grass line trimmer fuel lines

Find the required part specific to your product.

RG-LT-Replace-a-Line-Trimmer-Fuel-Line-Intro-Image
October 1, 2013By Lyle Weischwill

How to replace a line trimmer fuel line

If your line trimmer won't start even though it's filled with gas, a split or blocked fuel line could be keeping gas from reaching the engine. This DIY repair guide explains how to replace line trimmer fuel lines in about 30 minutes.

Repair difficulty
Time required
 15 minutes or less
JC-LT-Replace-the-grass-line-trimmer-carburetor

Replace the grass line trimmer carburetor

The carburetor mixes air and gasoline in the proper proportions to create a combustible gas. If the engine starts and then sputters, or doesn't start at all due to lack of fuel, you might need to replace carburetor. It's often more cost effective and practical to replace the carburetor rather than rebuild it.

Grass line trimmer carburetor

Find the required part specific to your product.

RG-LT-Replace-a-Line-Trimmer-Carburetor-Intro-Image
October 1, 2013By Lyle Weischwill

How to replace a line trimmer carburetor

If your line trimmer is hard to start or just plain won't start, the carburetor could gummed up, or its gaskets could be shot. You can replace the carburetor yourself, in less than 30 minutes. Just follow these weed eater carburetor replacement steps.

Repair difficulty
Time required
 15 minutes or less
JC-LT-Rebuild-the-grass-line-trimmer-carburetor

Rebuild the grass line trimmer carburetor

Rebuild kits are available for most carburetors. The kit contains essential components for rebuilding a carburetor, such as diaphragms, seals and gaskets. You can sometimes fix a fuel supply problem by dismantling and cleaning a carburetor. Use the kit to rebuild the carburetor after cleaning it.

Rebuild the grass line trimmer carburetor

Find the required part specific to your product.

RG-LT-Rebuild-a-Line-Trimmer-Carburetor-Intro-Image
October 1, 2013By Lyle Weischwill

How to rebuild a line trimmer carburetor

A line trimmer that's difficult to start could have a carburetor that's ready for a rebuild. This DIY repair guide shows you how to rebuild it yourself using a weed eater carburetor rebuild kit.

Repair difficulty
Time required
 15 minutes or less
JC-LT-Do-grass-line-trimmer-preventive-maintenance

Do grass line trimmer preventive maintenance

Proper maintenance ensures that a grass line trimmer runs smoothly and works properly. Refer to your owner's manual for guidance in maintaining the line trimmer. Replace parts such as the air filter, fuel filter and spark plug.

Do grass line trimmer preventive maintenance

Find the required part specific to your product.

RG-LT-Replace-a-Line-Trimmer-Fuel-Line-Intro-Image
October 1, 2013By Lyle Weischwill

How to replace a line trimmer fuel line

If your line trimmer won't start even though it's filled with gas, a split or blocked fuel line could be keeping gas from reaching the engine. This DIY repair guide explains how to replace line trimmer fuel lines in about 30 minutes.

Repair difficulty
Time required
 15 minutes or less

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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

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 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
 15 minutes or less
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
 15 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
 15 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, 2016

Tips for a hard-to-start grass line trimmer

By Sears PartsDirect staff

These tips may help you get your hard-to-start gas line trimmer running.

March 1, 2016

Grass line trimmer maintenance checklist

By Sears PartsDirect staff

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this helpful maintenance checklist.

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.