That’s a beautiful boat, looks like it turns on a dime, make sure those clamp screws are tight and you have a safety chain on the engine! It almost sounded like you had an ignition miss when the video started and you were running it at low speeds, but that might just be the audio quality and "buffering"!
Like we said, this engine will run just as smooth as most four strokes, and smokes very little at 24:1 when properly tuned…