I was given an older Stihl FS44 string trimmer. The primer bulb was broken, so I replaced it. The trimmer starts and runs, but there are a couple of problems:
It seems like the engine is running full power all the time. The trigger for the throttle doesn't seem to do anything.
The engine does not shut off when I turn the switch to OFF. The engine will die eventually if I set the carb to choke, but this does not seem like the best way to shut the machine down.
Any ideas of what to look at to fix these problems?