Bravo II Drive

[tucson_boat_guy]

I found this on CL, what is the difference from a Bravo 1 to a Bravo II.
http://phoenix.craigslist.org/boa/439255767.html

[BDMar]

Designed for a diesel as a workhorse. 2.2:1 ratio is a very low ratio requireing a very large diameter prop to work. Gear housing is not as streamline as a standard Bravo I.
What is your application?

[Beer-30]

I believe I saw it runs around a 20-inch diameter prop, as opposed to the normal B-1 at what, 15.25?