Here is an instruction on how to simply tune up your STIHL FS38 45 55 trimmers.

You may find that your trimmer is not running as fast as it used to when you are pulling the trigger. It reminds you that you should adjust your carburetor. But if carb adjustment or replacement does not still make it run as it was when you bought it, there may be something wrong...

There are a number of different trimmer heads used on various trimmers. And here we will take 3 type spools for instance.You need make sure the correct length and width of the line of your trimmer. If you purchase the wrong size line, your trimmer will not work properly.

All small engine equipment will become worn and dull over time. Take the weed eater as an example: you will need to adjust the carburetor speed to get a good trigger response and cutting performance after a session. Here is a simple fine-tune instruction on how to correctly adjust your carburetor on the weed...

If you have problems adjusting the carburetor idles, we have this step-by-step article with how-to video to walk you through the whole carburetor adjustment process.