Ok, I have a JD XT120 String trimmer. Third year of service. No problems....Till now. The engine is making a noise like a car engine low on oil. I have also lost power, most noticably when I turn it sideways to trim a bed edge. Am I about to lose this trimmer? Should I get another one right away? My backup trimmer is damaged and Im waiting on parts. May be a while on it. the engine gets extremely hot, too. It sounds a lot like there is string tangled in the head, but I checked...its all free. anyone else had that same problem?