Spud not sure if you have need for them but I have 2 waterman underdrives one 4.5" and one 2.25".The 4.5 is 22% ad the 2.25 looks to be 14 or 15%.No numbers on 2.25 so had to count rotations.I called waterman and seems they are around 480.00. Will make good deal on one or both.Contact me if interested.Might could work on trade off for fuel pump repairs.I have cpl 1100,990 and 80a pumps I need to get fixed or sale as cores.