That adapter is definitely
not what comes stock on our T-cases, although the attached sleeve & flat shaft on the input side seem to be correct; as well as the slotted/female output, for the cable.
All these adapters can be disassembled and components switched around, for correct rotation. What we need is the output side turning CW when the input is also turned CW.
Now what about the ratio? The one you need is
1:0.187 (for 9.00-20's) or
1:0.200 (for 43" tires). Clean that part and see if its marked with any numbers that look like a ratio. Or count the turns, input to output. If OK then I would simply change sides of the components, on the output side.
What you have does look identical to the tachometer adapter for the MF engine. But that one takes a 3-1/6" hex shaft on the (female)input; not a 1/8" square, male, like what fits in the T-case's sleeve. Also, it would turn in the
correct direction, only 5 times faster! (ratio is 1:1).
So really it looks like someone did a mix-match of parts there and then decided to give up, after seeing the "poor" results...?
G.