How to use a string trimmer?

1. Before mower MOWS the grass, it is necessary to clear the debris in the mowing area to avoid damage to the head and blade.When starting the engine under the state of cold engine, the damper should be closed first and then opened timely after starting.If the turf area is too large.The mower should not work more than 4 hours continuously.
2. After the use of the mower, it should be thoroughly cleaned, and check whether all the screws are fastened, whether the blade is defective, repair the high pressure cap, etc., but also according to the service life of the mower.Strengthen inspection or replacement of vulnerable parts.

Welcome Tony!!

Here in Hawaii I can buy two basic types of string trimmers. One sort of looks like a lawnmower and is called a billy goat. The other is a handheld piece of equipment, often used with a support harness that you wear. I use the handheld type, and if the job is a small one, I don't both with the harness. But if I have more than 15 minutes of work, that harness saves my back and shoulders.

Picking up trash and objects is important. Nothing like weedwacking right into a piece of something that got lost in the grass. Either the item gets trashed or the trimmer binds itself into the item. Occasionally the item might get slung aside.

Another biggie for me is to wear ear protection. Young people don't realize how important that is. By the time you notice hearing loss, it's way too late to protect your ears. I also wear facial protection. A face shield has saved my face and eyes from damage. Plus I wear long pants. If I didn't my legs would pay the price. I can usually get away with wearing short sleeves, but long pants are a good idea.

If the weedwacker is kept in good condition, I've used it for 8 hours a day. Well, that was back in the days when I was a whole lot younger! Now I can manage 5 hours before I'm totally pooped. The trick is too use the correct fuel, keep the air filter clean, and keep the motor free of debris so that it won't overheat. Also, don't bind the trimmer repeatedly on tall grass, tough grass, bushes, or fencing. Plus keep the unit maintained by tuning it up, greasing the head, etc.

My weed wacker uses woven string instead of a single strand. I have never broken the string. On other models I've owned, I spent half of my time on my knees, trying to get it going again. Mine is made by EGO.

I have found that in almost all weed whacking situations I encounter, a cordless hedge cutter used as a sickle bar mower is many times faster. It can cut things up to half an inch thick. It doesn't fling stuff everywhere.

Some more random tips:

1) Go for square or star-shaped line rather than round.  The sharp corners cut better.

2) For gasoline, either use it all THAT DAY, or go non-ethanol.  Them corn squeezins corrode small engine parts like no other!
https://www.youtube.com/watch?v=bEf9Fdvx_Sc

3) They make straight-shaft trimmers that can cut under fencelines easier and can be fitted with sawblades for removing tough brush.  If that's not you, however, you can go with a cheaper curved-shaft.

4) Do you even need one?  Ever since I got my scythe with brush blade I haven't needed my old trimmer.  Very little maintenance and a much more pleasant experience to use.

5) Always, always, ALWAYS wear eye protection and shoes!  Okay, sounds pretty basic, but I was in the middle of something else and needed to clear some stuff up real fast.  The goggles, I always keep hanging around the machine's D-handle, so I put those on, but didn't bother to go inside to put on shoes.

Everything went great until it decided to grab some chain link, crawl along it, and right over the top of my bare foot!  Hurt like crazy and made a mess, but worse, there's a vain that runs right across the top of your foot...  As it started swelling bigger and bigger, so did my eyes.  Thankfully it never popped, because if it did, I'm sure a day in the emergency room would greatly outweigh any time saved by cutting corners!

Wear SHOES!