How to Adjust the Carburetor on a Weedeater

A Weedeater helps you keep your yard in shape.

Weedeaters are an incredible tool to help you maintain your lawn and landscaping without hours of back-breaking work. Like any tool that has an engine though, a Weedeater needs regular maintenance. Learning how to adjust the carburetor of a Weedeater is easy and doesn't take much time. It is perhaps the most important skill to know to maintain your Weedeater because a carburetor that is out of adjustment will eventually cause damage to the engine.

Things You'll Need

• Phillips-head screwdriver
• Flathead screwdriver

Instructions

1. Locate the two screws on the side of your Weedeater. They will be on the side of your carburetor; one will be marked "L" for low speed, and one will be marked "H" for high speed. Some models may have an additional plastic screw which is for an idle setting.

2. Turn both screws to the right to tighten them until you cannot tighten them anymore by hand, using either the Phillips-head or flathead screwdriver depending on the type of screws your model has. If you have the third plastic screw, do the same.

3. Turn the "L" screw three-fourths of a turn to the left.

4. Turn the "H" screw 1 1/2 turns to the left.

5. Start your Weedeater. If you cannot keep the Weedeater running without giving it gas, turn the "L" screw very slightly to the left. Keep adjusting this screw until the Weedeater will idle smoothly.

6. With the Weedeater still running, give it gas by pulling the trigger, hold the trigger down completely and adjust the "H" screw in small amounts to the left until the Weedeater can run continuously without missing.

7. If your Weedeater has a third plastic screw, with the Weedeater running, adjust this screw very slightly to the left or to the right to fine-tune the idle speed.

Tips & Warnings

• Check to make sure your carburetor is not clogged with dirt and that your air filter is clean; this will help your Weedeater run smoothly.

• Do not operate your Weedeater if the engine is running roughly or keeps missing; the wrong settings can damage the engine permanently.

Resources

• Landscaping and Maintenance Tips