Re: What's a surface drive?
Those are for pretty hardcore go-fast boaters. I'm sure they're driven by some rather unconventional motors. Definately not for your typical weekend captain. Maintaning Hi Perf boats is not for the financially challenged, to say the least. Proximity of a qualified and willing service facility should be carefully considered. Most places wouldn't touch it.
MerCruiser once made the Blackhawk which fit a conventional motor and a conventional Bravo tansom bracket. It was a twin prop and considered a surface drive. Those might be a lot easier to find service facilities qualified to work on them. They basically look like a stubby Bravo with twin screws. If they were Blackhawks, they would've said Blackhawk.
These are surface drives you might find on that boat...