My old beater bayrunner is down at the yamaha shop waiting in line for its new 50 hp outboard to get bolted on. Now, its my understanding I can increase the hp on this 50 up to a 60 by installing a different circuit board on the engine. So...I got to wondering how does it do that ? How does the electronics increase horsepower ? Does the circuit board allow the engine to run at higher rpm's or is it by some other means this magical power increase comes about ?