Alan:Gearbox Reduction - IP350 (UK)

Hello All

I am in the process of purchasing a new Darglow Featherstream folding propeller for our IP350. Unfortunately I have come away from the boat, now stored in its winter shed in Germany, without getting a key bit of information that the propeller manufactures require. Our boat is number 88 circa 2000 with a KBW-10E gearbox. We have the engine and gearbox manual but there are 3 ratios that the gearbox could be. So we need to be sure.

Would anybody know what the gearbox reduction figure is for an IP350 of that age?

Thanks in hope,

Alan Williams