Move the line trimmer to a well-ventilated area and check the fuel lines for cracks. Replace the fuel lines if they're leaking. If fuel leaks from the carburetor, rebuild or replace the carburetor to prevent gas from leaking.
Replace the fuel tank cap if its seal is damaged and leaking. Check the fuel tank and replace the tank if it's damaged.
THESE REPAIRS MAY HELP SOLVE YOUR GAS LINE TRIMMER PROBLEM
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.
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.
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.
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.
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.