HOW TO STRING A WALK BEHIND TRIMMER MOWER
Wheeled weed trimmers, deal with tall, thick and tough vegetation, so their cutting line can wear down, but you can easily string in new line without any special tools or skills:
KILL THE ENGINE
Kill the engine, wait for five minutes as the parts cool down, disconnect the sparkplug wire on the engine, and place it away from the plug. Clear away any weeds, grass or other material from the cutting line holder present at the trimmer’s front, and use pliers to pull out old cutting line. Unroll the new cutting line and cut away a 23’’ length using a sharp knife. Repeat this for another piece of new line.
INSPECT THE CUTTING LINE HOLDER
Inspect the cutting line holder for signs of damage. It consists of circular cutting line plates bundled one over the other to all variable cutting heights. All plates have two line-installation points 180 degrees apart, and both installation points have a large center hole that has two slightly smaller holes on each side. These three holes have a flange on the top that has a notch exactly above each of the two little holes.
CUTTING LINE PIECES
Put the other end of the cutting line into the other smaller hole. Push the line inside these holes until both ends come out of the center hole. Pull the line to make the ends even, and then pull the ends of the line out. While you’re pulling, the line creates a loop above the line plate that you need to push into the notches above the smaller line plate holes. Keep pulling on the ends of the line until the loop hooks up to the flange atop the cutting line plate holes, and the line gets tight. Install the remaining 23’’ cutting line into the installation point on the other side of the cutting line plate.
START UP THE ENGINE
Start up the engine, engage the line holder’s drive belt and let it spin for some seconds to fully seat the fresh cutting lines before you get back to work.
Note that depending on your wheeled string trimmer’s exact specifications, the method for reinstalling cutting line may differ, but the general principle will be similar.