Horsepower increase on F115

Hi all, I'm new to this post, and I have a question for you mechanical gurus out there. I am running a Tracker Tournament V-18 aluminum with a Yamaha F115 and a 19" quicksilver Trophy (4 blade) prop. It gives me an OK acceleration and a top of about 45 mph (running at 5 gph at cruise-37 mph). I would like a little more acceleration, and a little more top at some times.

I heard that it is possible to boost the horsepower of the Four stroke 115 to approximately 150 HP, by changing a chip in the engine and reprogramming it. Anyone out there knows anything about that?

Thanks,

Suriname

[boats.net]

The ECU doesn't have replacable chips. I don't know of any way to increase the engine horsepower.