Your string trimmer will be of much use once the warm weather sets in, along with the weeds. However, just when you need it most, a variety of problem starts in your trimmer. The tool owner frequently finds himself at a loss about what to do next. However, some of the problems associated with string trimmers can be solved by yourself if you know something about the mechanical tool. For a start, you can check why the motor of your trimmer is not catching on.
Checking Your Fuel State
The first thing you should check on a malfunctioning trimmer is the fuel. Since it has been stored in your shed or basement all winter, the fuel in the tank may have dried up, or you may have neglected to fill it before storage. Most of the fuels that are available today also lose their potency in a month’s time. To help in prolonging the effectiveness of your fuel, you can try adding fuel stabilizers. If there is still fuel in the gas tank of your trimmer, smell it. If it smells a little sour, or its odor is different from fresh fuel, it is best to replace it. However, bear in mind that most trimmers require a certain fuel and oil ratio. Check on your manual for the right combinations.
Checking Your Spark Plug
Once you have made sure that your fuel is still good, you then have to check the spark plug. Remove it and see if it is still cocoa brown in color. If it has been corroded and blackened, you will have to replace it. You can check if your spark plug is still good by connecting it with the plug wire and letting it rest against the engine cylinder. Make sure that the bottom part of the plug is in contact with metal. If there is a kill switch in the tool, make sure that it has been turned on. Pull on the starting rope to see if a spark flies off the space between the ground rod and the electrode. If so, install it again and try starting the engine.
If the motor of your string trimmer is starting but not revving up, check your muffler. Many of the 2 cycle engines that are installed on string trimmers do not use up all the oil mixed with the fuel. As a result, there is an excess of oil in the engine, which usually carbonizes on the screen of the spark arrestor that is located in the muffler. If your muffler is cool enough to be touched, check if there is a screen in it that can be removed. The set up can vary according to the brand of the trimmer. If the screen can be removed, take it off and clean it using a wire brush. You can also use pliers to hold the screen while you are torching off the carbon. Reinstall the screen once it has been cleaned and try starting the engine again.
If your trimmer still will not start, your carburetor may need to be adjusted or rebuilt. This has to be done by an experienced professional, but is not very expensive.