Despite it's supporters, that would be an extraordinarily odd choice, especially after it was discontinued.Is it possible the Atomic 4 was a refit?
Frankly, I think there is no way to defend a gasoline engine on a boat, over a diesel. Vapor ignition, carbon monoxide, cost to maintain, etc. It's on my never list. I'm not saying all boats that already have one should be avoided, but I'd never convert to one.