I had a problem: I could not complete Checkpoint Charlie. It didn't matter how fast I went, my runs were FLAWLESS, but I could not complete it, I was short by like 20 seconds.
I recorded a video of myself doing it and then watched it side by side along a speedrun. My boat was definitely SLOWER than the one in the speedrun.
The solution was to go to "Display Setup" and turn "Frame Limiter" ON.
I did not see this documented anywhere so I am posting this here so Google indexes it.