Hi Guys,
I received this from another forum.
Maryak, have a lot of experience with engine, saws and trimmers used to see them and still do repairs as a side line, the way they work is you must run the machine at full throttle, this give its horsepower, keeps the engine cool and make the line on the feed head the straights, if you run it at a lower speed the line is curved and you are now cutting in the curve area of that line and will use more line and then the heat transfers back into the head and melts the line together, so keep an eye on the head, don't get it real close to the edge of what ever you may want to cut, when you see you are to close tap the head and get more line out then come back to contact point of what you are cutting, have fun, Lathe Nut
Guess what............It's spot on. Took me all of 15 mins to edge my lawn and 2 bumps on the feeder.
My Thanks to all who offered their help.
Best Regards
Bob