Additional question on bush hog -- the last year or so when I release the PTO there's all kinds of clanging back there like something's loose. Didn't know if it was gear box, (seems not) or blades or what. We checked underneath as best we could and the blades seem secure .. any idea what that is about? (Doesn't happen all the time, but it's frequent.)
Burning Bushes overrun clutch could be bad or going bad. If she has the old style she may be able to grease it. On the old style there is a Allen head cap that needs to be removed and then add a grease fitting so your able to use a grease gun. Can't have a grease fitting sticking out because it's sure to get broken in a matter of time. Use a Allen wrench to remove the plug/cap then screw in a Grease fitting in it's place. Then a grease gun to pump in the grease. Here's a pic. of where to look for it. Ph. camera so it's the best I could do. If you have it your see it.