I disagree. You cannot just claim something illegal. Only a judge has that right to interpret a law.
Many people put lower pitch props on their boats to increase acceleration. It's the same theory as putting a lower gear ratio in a drag racing car. It helps the car and boat jump out of the hole. Plus, why wouldn't someone have a spare set of props so he or she can drive the boat on the lake? Use the other props if they take it to another lake. I have a 23' pontoon with a 140 hp motor on it so I don't have a dog in this fight but it just doesn't seem right to me the way the law is written.
What if I had a 27' pontoon boat with a 300 on it. That can go over 60 mph so by the law it would be illegal but probably never pulled over because it's just a quiet pontoon boat. The 30' go fast boat that only does 59 mph would be legal but a lot of people would want it banned because it looks and sounds fast.