Join Date: Jun 2005
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Just my two cents, I think the 12x10 should be fine and your cruise RPM @ 5.5 kts should be around 2800, with the engine capable of reaching 3600 if it needs to, but the speed of the boat will not inprove much. She will push a bow wave, raise her nose and double fuel consumption.
At 2800 RPM and 5.5 kts, she should hum along sweet as a single can and burn less than a quart an hour.
I could be wrong, but if I am, it's not by much.