True if its bogged down in displacement plowing water it would not make top WOT. But if it is doing almost 20 knots so it's on plane.
We are also assuming 6000rpm was WOT. If it were 6400-6500 and now dropped 500rpms on WOT. Maybe not.
I think we agree that something changed in prop efficiency or the hydro-dynamic load/drag is different? The power head is fine.
And most people power wash the boat when hauled. That could be his speed difference.
Quote:
Originally Posted by Gerry Zagorski
Agreed Frank... If however he had bottom growth, I doubt the engine would turn 6000 RPMS.... The motor would likely just lug and not get up to the rated RPM. I've seen boats with growth that wouldn't even get up on plane...
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