This boat just won’t climb on plane as you will notice after the engine finally fires. On plane means that the center of the propeller at the shaft becomes equal with the water’s surface which allows for much more speed. It’s a matter of getting enough forward speed to allow the propeller to “bite” enough to gain speed.
You can tell when the engine and boat are on plane when you hear the engine RPM slow way down suddenly. Then, the engine can push the boat far faster allowing for much more speed. Does that make sense? This is what I grew up with and I love it! Disclaimer: This is not my video.