"Funny how boats take so much HP."
Well you know what they say ---
It is like doing a brake torque with your car all the time.
In fact the worst strain on the drive in a boat is when you are just holding plane and slow putting along. Well that is other that the initial hole shot to get up on plane.
BTW if you think waxing the Z is a PITA try 28' of fiberglass and in the case of my best pal Mike's 42'