YOu think this drive pulley doing this is the cause for my funny acting hydro on my C160?

http://www.youtube.com/watch?v=wuNv3-zBqtY

It may take a few minutes for this vid to be available.

Duramax-Is that thing slipping in and out-or around and around also? Maybe under load it slips around the crankshaft then catches every once in a while on the key- AL

The in and out is what i was talking about. So im guessing its not suppose to do that. I didnt think about it slipping round and round. Good pint. Id better pull that PTo and check it out before I drive it much.

Yeah, I would say you have found the problem.

There are pretty simple to take apart. When you get down to the actual pulley my guess is that you will find a missing/broken key and possibly a missing allen headed screw or two.

I hope thats it. Ill get her apart int he next day or so hopefully