Mike C,
I'm assuming it is a jet drive, because that is all I'm finding on Tracker and inboards. From what I've read so far, it sounds like none of them are too fast. Probably not built for speed - more of a shallow water exceller. I found a report of a Tracker with a 175 jet only doing about 40mph, and the comparison of a 225hp jet to a 150 outboard. From the sounds of it, the jets are very inefficient at converting power to push the boat - only achieving about 60-65% efficiency.
Here's another link:
http://www.wmi.org/bassfish/bassboard/boats_motors/message.html?message_id=199885
All the best,
Glenn