I had an Albin 25 w a 34hp Yanmar and could get slightly over 10 knots at WOT. It was the earlier rockered banana bottomed boats. At 8.5 knots visibility over the bow was completely acceptable and for over a year I cruised there .... At 2750rpm. I spent lots of time at that speed and rpm. When we took the boat to Alaska I dropped back to 7.35 knots and I don't recall why.
I suspect your boat would be happy at 3000rpm cruising for many years. But I'd still keep digging for better numbers on your engine.
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Eric
North Western Washington State USA
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