Further to another thread. I have never changed a fuel filter in a petrol tank. I have never greased a bar tip on any saw or the clutch bearing on a husky. I have never cleaned the fins on my 2 strokes. In twenty years I have not changed more than 10spark plugs on the saws/strimmers/hedge cutters. When I have it's usually in an effort to fix a saw, and it hasn't worked. Despite all this my saws/bars seem to last as long as anyone's. I'm perplexed, what am I doing wrong, or right?