Need a little help guys. I have a spinelli prop on my boat and no spare. The spinelli has no numbers that tell me anything about the pitch or diameter. Was wondering if anyone had this setup and what they had. I have a Mercury XRi 175 HP Black Max. I have heard that the FURY was the one to get but I don't have a clue. Boat is a 18' 10" 1994 ZX175 Skeeter single console.