RPMs - Engine issues or normal?

So, I've always been pretty disappointed with my hole shot. The feeling while driving the boat was a "hesitation" before I could really feel the boat push the water. Well, on Sunday the conditions weren't the best, so a buddy and I decided to do some testing, and since I just had my 4-blade prop repaired, we figured we do some prop tests as well.

Back to the "hesitation", to try and eliminate carb issues, I had the carb rebuilt. Still had the hesitation, so I checked the accelerator pump as per all the instructions from previous threads. Hesitation persisted. One thing i really had never done before was keep my eyes on the gauges as i was more concerned about where I was going. So we affixed a camera to point right at the tach and speedo. In the below video, i cropped out the speedo as it doesn't really help with the tests and I generally use a GPS on the smartphone.



So my question is: Should the engine/boat/tach do what it shows with it almost jumping from in-gear rpms to almost 3k? There definitely was not a smooth transition through the 2-3k rpm range with either prop. It does look like the 4-blade recovers better.

Camera View of the carb during hole shot. The link also shows both prop tests and a short cruising. In the linked vid, it appears that the carb is functioning correctly.

Suggestions? Our initial thought is maybe the fuel pump is starting to weaken and/or the fuel lines are starting to collapse from the ethanol. As Pete would say...test before throwing parts at it...how does one test the fuel pump (sinceince the carb is obviously getting the fuel.)..but not sure if it is the right pressure?

All thoughts are welcome!

seems normal. that hesitation is possibly just before the hull planes out

400rpm difference between the 2 and both only give you 38mph? Put them both on the mantle.

Instantaneous prop slip when going WOT from idle is normal. The difference between the 2 where they "catch" is due to how much pitch they have, which is consistent with the wot rpm you see (and the differences between the 2).

This must be a '89 with those gauges and a 1.23? It really helps to remind us what boat and powertrain you have in order to generate meaningful feedback.