Weed eaters are great little machines that ease the burden of removing those pesky weeds from your yard. Weed trimmers are made of an aluminum or steel body, a handle, and of course the blade or string, and motor. Some types of weed whackers have 2 handles for extra control.
Usually weed trimmers do not really require all that much maintenance, making them them relatively easy equipment to care for properly. Pretty much all you need to do is keep it clean so that it does not rust. Also, cleanliness keeps the weed eater from getting a spoiled blade or clogged up engine. Weed trimmers often get grass and other debris trapped inside, so you will want to remove the clutter with a leaf blower or an air compressor. If your weed eater uses a string, you want to replace the string whenever it thins out or looks like it's about to break. When you restring, be sure that you have a good length and that the string is threaded correctly.
When getting a replacement string, be sure to check the manual for the proper size. If you observe that the string is loose, remove the head and cut the new string, just make sure that it's over six inches for proper functioning. Always follow the guides correctly when threading the string or you run the risk of the head popping off during use, which is a safety issue.
You can make things even easier by purchasing a string replacement cartridge rather than replacing the strings by hand. This is more expensive, but if you're not comfortable replacing the strings yourself this is definitely the best way to go so you can be sure your weed eater will run smoothly, plus it will save you some time.
Other than that, make sure to clean out your weed trimmer after every use, and it should last you for many years. Happy weed whacking!