Most folks that own or work for a "LAWN-SERVICE" outfit remove those debris shields (some of which have a useless line-cutting feature that works only for 50 feet or 50 seconds, whichever comes first. ) They opt to carry a small pair of dykes ( side-cutters ) to trim the line... and they control the direction of debris travel , by tilting the trimmer head SLIGHTLY, .. to the left or right while trimming , it does take practice but it's worth it !! ..:thumbsup:
Next time you see a lawn-service look at their equipment , and observe their motions ....
I DISAGREE.
I own a lawn service. I DO NOT remove the guards from my trimmers and I don't plan on doing it any time soon.
To begin with, it's illegal. As a commercial operator, you can get fined for doing it. It's also unsafe, as the debris can go in any direction regardless of which side of the line you use. You can control where most of the debris goes, but not all of it. In addition, it's not always possible to trim with the good side of the string due to close quarters. It also wastes line and decreases the quality of the trimming because you don't know where the tip of your line is.
I'm going to sound like Bert here, and do some math. Say your trimmer has a 14" cutting swath. The tip of the line will move 43.96 inches for every rotation of the trimmer head. Most commercial trimmer engines can turn 8000 RPM, which results in the tip of the line moving 351,680 inches per minute. Convert that to miles per hour: 333.03. If you were to get hit in the leg with a pebble moving at 333.03 MPH, I imagine you'd put the guard back on. Okay, the line tip probably can't move a pebble that fast due to flexing and loss of inertia, but even at 150 MPH it would still hurt.
The reason many commercial outfits remove the guard is to run longer line, which puts excess wear and tear on the trimmer.
There are 3 varieties of guards: those that are inadequate (Echo is one of these), those that are just right (Toro, Stihl, Husqvarna, etc.) and those that are obnoxiously large (the guard on my Dolmar MS245.4C falls into this category.)
Oh, and the only time that the line cutter on my Husqvarna doesn't work is when I leave the string too long after respooling. (Like, 2+ inches too long.)