How To Fix A Bogged Weed Eater-- Carburetor Replacement
Sting trimmer bogging has been a common problem. Now here is a step-by-step instruction on how to fix a bogged trimmer permanently by replacing the carburetor.
If you have your trimmer bogs when you go to throttle up and you have tried to adjust the screws on carburetor, you need to replace the carb.
Before you start, if you have any old gas left in the fuel tank, you need to dump it out and refill with fresh fuel.
Step 1: You want to remove the air filter cover, the air filter, and the air filter housing with an eight-millimeter nut driver.
Step 2: In case there is pressure in the fuel line, you need to loosen the fuel cap. If you do not do that, there is pressure when you remove the fuel line and the fuel cap is just going to squirt gas.
Step 3: Take the carburetor off. Now you need to remove the gasket and the fuel lines that are connected to the carburetor. You should be careful when you do this because it is very easy to damage the fuel line. But the throttle cable is still connected, push it down and it is going to disconnect itself from the carburetor. Here, you can get the entire carburetor removed.
Step 4: Reinstall the new carb. Do not forget to reconnect the throttle cable and the fuel lines to the new carburetor.
Step 5: Put the air filter housing, air filter and the cover back on.
Step 6: What is left to do is start the engine up to check if the carburetor needs any adjustments.
The High-Speed Screw
You need to start with the high-speed screw rather than the low-speed screw on a string trimmer. However, low-speed adjustment is the top priority on chainsaws.
1.Press and hold the trigger down to run as fast as it can.
2.Use the little screwdriver to turn the high-speed in and out until you find the spot where the string trimmer running the fastest.
3.Unscrew the high-speed screw slowly until you hear the RPM (revolution per minute) start to drop, then turn the screw back in again until you hear the RPM just come up to a position where it is making the humming sound.
That is the ideal position of the high-speed screw.
The Low-Speed Screw
1.Here, you do not need to hold on to the trigger, you just need to leave it at idle. If the string trimmer does not idle, you just need to turn the low-speed screw in until it idles.
2.Similar to the high-speed screw, turn the low-speed screw in and out until you find the sweet spot where the string trimmer idling the fastest.
3.Turn the low-speed screw out very slowly until you hear the RPM just start to drop.
4.Leave it there, do not turn it back in.
You will receive an excellent trigger reaction when you punch the trigger again.
By the way, you’d better check if the carb is leaking fuel especially when pressing the bulb, replace the carb if necessary. Check the fuel flow after you put on the new carb, then put all things back on and try to start it.