Correct it comes as 1", you need the to 1 1/8th adapter found on ebay.
http://www.ebay.com/itm/1-to-1-1-8-i...gAAOSw5VFWGSvV
Then you will need to cut the key shorter since the PTO uses such a small one on the 682.
Right now its all bolted in and aligned.... PHEW! Moving that 150LB beast in and out of the 682 alone isn't the easiest... Thinking back now removing the hood and the grill woulda really helped. But too late now.
Now to tighten it all down the last 12 bolts and add fresh gas, oil, battery, connect a few wires and give it a crank.