Re: extra power
Unless you would have a need for dual engines, you might consider selling the 30 and finding a good used 50 or 60 or 75 hp. You might find that the price you pay to "upgrade" rather than buying a second engine is less or not much more than having two engines. Two engines are less efficient in a couple of ways - first, its quite a bit heavier per horsepower, second, it's twice the maintenance. Third, it's a little more complicated installation and set up (dual controls, gas lines, etc.) In fact, my guess would be that a single 50 hp would be similar to dual 30s in overall performance with a much simpler set up. But you have redundancy with duals. But that (redundancy) can be accomplished by purchasing a little 5 hp kicker for a back-up, which would serve you for trolling also. Just a few thoughts. If it were me, I'd definitely check into replacing it with a larger single engine.
