I actually have 2 K&B .65 sportsters, both I got new but have only ran the 1 so far. I had a thought about running both .65's on this boat, but I think the engine mount would get a bit large and heavy to hold two .65's turning 12" or 13" props. Speed wouldn't be a problem; keeping the boat upright would be the problem. Not to mention I'd have to engineer some sort of bellcrank system to pull 2 carbs simultaneously.

Great idea, but I think a bigger single motor is the ticket. Don't get me wrong - this old mifit of an engine gets the boat around good... If it had a carb for a civilian sportster engine it'd probably go better. The drone engine carbs have something amiss inside thats manufacturing related. (They were supposedly spec'd to pretty much run at WOT on a wood 12x6 prop on a foam mig 29 airframe)