Can't comment on outboards, but 300 hp in an I/O works fine. I get about 25 knots medium load at 3400 rpm with a 300 hp 350/volvo duoprop. The boat jumps out of the water in a hurry when you hit it from idle. Speed drops pretty fast with weight added, more like 23 knots loaded heavy.
Even with a much lighter power plant than the twin 165's, the boat still likes more weight forward, especially as fuel gets burned. Seems like an outboard on a bracket is going the opposite direction. Putting a substantial water tank under the deck in the cabin, like Strick and Blue Heron are doing, might be a good thing to do with an outboard, helps lower the CG as well.
Last edited by cdavisdb; 10-18-2011 at 02:33 PM.
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