I have a 1992 19 foot Bluewater Cuddy. It has a 4.3 with an SE 116 outdrive. I am not sure of the gear ratio, assumed it is a 1.81. I will have to check the numbers when I get home. It came with a 19 pitch Solas 4 blade prop. It gets on plane quick with the 19, but easily over revs past 5,000...