I hear you, Bondo, that seems to be the consensus, this is what the seller is giving me:
1500 RPM, 9 knots, 3 GPH
3000 RPM, 22 knots, 19 GPH
3300 RPM, 28 knots, 28 GPH
They seem sort of reasonable to me for a 14,000 lb boat with two small Yanmars (230hp)
What do you think?