Do as Moose suggests first. I think this is the kit for the Honda engine to Mercury/Quicksilver prop (double check). I had a Vengeance prop from my old EFI Merc, I used this flo-torq to mate with my 250 ToHondasu. I ended up going to a different brand with larger diameter, larger surface area prop and I let my neighbor use it.......like forever, he sold the boat with it.
https://www.amazon.com/QuickSilver-8.../dp/B002IZDJH6