FWIW, my V-20cc with a 1999 Merc 225 Saltwater series (carbed motor) with jackplate did 53 mph wide open with 60 gallons of fuel and me. You should have seen the look on the doofus on the jet ski when I passed him ... priceless.
I was turning a 15 1/4 x 19p 3 blade stainless no name prop @ 5600 rpm. Had just a touch of trim tab, motor trimmed out and at max elevation on jackplate. Oh yeah, I also had the bimini up and there was a bit of a breeze and a very light chop. The prop was kind of blown out. My guess is that there was another 2-3 mph with a better prop.
My understanding is that the Opti is actually more stout than my carbed motor. I'm looking for a late model (07 or later) 250 opti for the back of the Short Bus. She should scream with that and I should see a doubling of my mileage. I hope so because 2mpg sucks (fuel).
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