I have a 2000 TJ 19' with a 175 sportjet . Mine is a 200 HP Black Max (I believe) power head set on the Sportjet pump.
At 5,000 rpm it uses about 8gph of fuel, (5500 is max rpm) less rpm less fuel. Have had 1 minor carb. problem (needle stuck) and it is a little cold blooded as noted above.
Has a good hole shot and up on plane quickly . Handles the load well with up to 5 adults in the boat. I don't know what the cost difference is now between the sportjet and an inboard but it was considerable when I bought mine. It is a good motor for me so far.

Good luck

Doubletake