JOHN DEERE GX85

I have a GX85, which apparently is not that well know of a John Deere Mower.

I used it last summer, yet this summer is will not move.

Turns on, goes into gear, turns blades, yet will not go forward.

Figured it was a belt, yet they are in tact. If I jack up the back wheels (The ones that turn to push mower forward) then they spin slightly.

It looks like it just doesn't have enough power to move forward with any weight on it.

DOES ANYONE HAVE ANY SUGGESTION ON WHAT THE PROBLEM COULD BE?

Or How I could fix it?

Sixpack of beer in it for whoever can help me out.



Thanks,

Bob