It's funny because they gave me the handle when they sold me the boat. I just don't have the mechanism on the back of the shaft.
If you have a picture of what you have, I probably can send you what you need.
There is no real "mechanism". It's a 1/4" x 20 bolt, a washer, a bell crank arm and a trunion for the end of the cable with a clamp.
GT