Lower Bravo 3 drive unit with a 2.0 gear set. I had a low speed impact with a rock on the scag (see Picture) it put a hairline crack in the housing I decided to replace the housing with a new one instead of fixing this one. It has low hours on it and is in working order with all the internals functioning it just needs someone to weld up the housing or you can buy a new housing and switch the gears out. it came off my formula boat with a 8.1 mercury big block.