I have the same blower, came with my
b7100. I keep waiting for it to snow enough to use

I did try it out once, seemed to work ok. I do have a question though, does the PTO shaft go straight into the blower? Mine almost looks like there was a reduction gear bolted to it at one time due to the way the paint is not faded as much. Also, what PTO speed do you blow at? Mine is well-used and didn't seem to move snow very far unless it was at 1000 on the pto. There is a pretty good gap at the end of the impeller blades so I wonder if it is not just worn and needs to be worked over.
Charles