@Kade12 I have a 2017 AR190. Same engine/pump setup as yours. I previously had a 3.0L Mercruiser I/O in a 19ft bowrider.
You have to change your technique with the Jet as compared to a regular boat. Just like docking, or trailering, it's a different boat, and requires a different technique. Same reason a good driver in a Miata can keep up with a bad driver in a Corvette on a road course, good technique makes all the difference.
In a prop driven boat you just hammer down and turn. The centripital force pulls the tube out of the wake (as it attempts to straighten the rope, and the wake curves under the tube).
With a jet you have to gain speed, turn (which scrubs speed), straighten out to let the pump catch up, THEN hammer down and accelerate. Adding throttle in the middle of a HARD turn will just cavitate the pump. Even a well sealed pump with an L13 cone (I have that setup BTW) will cavitate in this condition. Just the nature of the beast of a jet pump IMO. SO, try instead to start around 22-24mph, turn into the corner hard, then loosen the turn as you add throttle gently. You can get quite the pull without a super tight turn, and by adding throttle while monitoring cavitation.......100% technique IMO.
I can easily get 100lbs+ of riders (single or combined) outside the wake. It's only when I have two little people out there that getting them outside the wake is difficult. I have to add speed to get the little ones out, and they typically don't like that. "Normal" tubing speeds are 22-25mph for me. I let it drop to 20 in the turns, and I'll sneak as high as 27-28 before turning depending on conditions and riders.
Also, as mentioned above you want that tube FULL of air. Not kinda full, or "yea that's good enough" full, you want it TIGHT. This allows the tube to skip across the water instead of drag down into it. I run a standard 60ft Airhead Tube Rope, and it does OK, although the riders get some spray to the face when riding directly behind the boat.
I promise power isn't the issue here. The 190 has plenty of it for tubing, just need to adjust HOW you use it.
