Need help identifying a 1990 Yamaha V6 outboard.

[yodaddy]

I recently acquired a 1990 Yamaha V6 outboard that has a cover with 200hp markings, and a tag on the mounting bracket that says 175ETXD. I've tried to figure out which it is by part numbers, but it seems the 175 and 200 used the same carbs and every other part I could think of checking.

Can any of you outboard gurus tell me if there is a way to determine the HP on this motor?