Repower...going to change upper- which ratio?

[hystat]

Hi - I have a 1992 18.5' boat with a 3.0LX/Gen II
It currently runs 36mph at WOT speed of 4500rpm with a 17P aluminum 3 blade prop.

I am going to put in a 185HP V6 (MR185 3.8/229 4 BBL) that I have here.

Which ratio drive would I want to buy? 1.62 or 1.81?
thanks!

[Tech Support]

You would need the 1.81 ratio.

Tech Support