Are you still watching this or is it too far gone?
I assume you trimmed for the best WOT rpms. That yammie runs out at what 5500, 6000 max recommended rpms? You are so far from that something is dreadfully wrong. I don't know what a Veranda tri toon is, nor the length/weight. I ask the question because the engine may have been propped for a lighter, faster boat. Just because the dealer stuck it on there doesn't necessarily mean it's the right match. I had that happen to me in buying a new boat once.
What's the gear ratio of the engine? 2:1, 1.64, 1.87?????? Any idea if your tach is accurate? What are your IDLE rpms in F gear boat moving? What kind of prop is on it now, SS? Ported? Rake? Cupped?.......if you don't know, just shoot a CLEAR picture of it from about 45 degrees to the rear, shoot from about 3 feet away and post.
