first guess is you maybe can  blame someone else...in this case driver error.   If the driver was also used to the i/o and not accustomed to the substantially more powerful  inboard, there is no need to "put the hammer down" w/ the throttle.  Have him think more about "rolling the throttle on" rather than pinning it down.  If you regularly have the same driver, give him or her plenty of feedback til you guys are in synch.
Next step would be to modify your start technique...a couple good threads on this forum w/ regard to that.

1)    As they have said before, skier – driver communication is important. I believe in saying; “ O.K. driver, pull.” And if there is slack in the rope say; “ Driver, in gear” then say,” O.K. pull”. You need to agree ahead of time on hand signals. Refer to the standard published ones.
2)    With the driver seeing all is clear in front of boat, they then can watch you in the mirror to give gas as needed.
3)    Hold the handle as you would a baseball bat. This will keep the handle from rolling out of your hands.
4)    With the handle level, your left hand should be over the handle and your right hand under. This has nothing to do with getting up but will help balance your pulls. If you do not understand, let me know and I will explain further about off side/on side.
5)    You should pull the ski under you and as close to the surface as you can while keeping the tip out of the water. Keep in mind that is where you eventually want it. (on the surface)
6)    Now this tip has helped many people. Hold the handle down to your front boot. You will not be able to keep it there, but it will give the first initial pull on your ski to help get it out of the water.
7)    As you are being pulled out of the water DO NOT rush standing up. You will only push you ski under the water.
8)    Good luck and ski safely.

Since your 15 yrs. into it, I know you can do it and so do you!

WTS, The only things that stand out to me is maybe some impatience on your part trying to stand up too soon or a little impatience on the drivers part. (This is more then likely the culprit.) Most i/o's are very sluggish out of the Hole and need to be Hammered pretty hard with the throttle. But, inboards are very powerful like a 4x4 in Low range. So, as stated above, the driver really needs to learn how to begin to gently and progressively pull skiers up.

If done right, it's such a nice progressive pull that it takes almost No effort on the part of the skier. (I actually conentrate on relaxing and not expending any energy while being pulled up.) But, it is team work and does require skier/driver feedback until your both on the same page... (this will be true for every other skier behind the boat as well.)

Had a similar situation myself. Stick to the basics. Stay in a ball and keep your legs in tight to your chest until you plain or even longer. Also, like others have said, try slowing the way your driver pulls you out of the hole. These two solved my problem.

It is definitely driver error.  You need to give it progressive throttle.  With the I/O the driver is probably just nailing it and it takes time to get up to speed.  With the new inboard if someone nails it the handle will definitely get pulled out of your hands.

When we got the Malibu I currently have my Dad hadn't skied in probably 7 years.  Our next door neighbor drove for my Dad and he couldn't get out of the water and was very frustrated.  I took him out the next time and he got right up.  It is all about the driver.

I had a friend who kept on taking one hand off to give a thumbs up to the driver when he wanted to go! As soon as the boat went into gear he would rush to get his hand back on the handle and more often than not, fail to get up.

AFter doing this for 5 or 6 attempts I told him just to shout when he is ready, I couldn't believe he didnt figure this out for himself sooner!

"make 'er talk!" is one of my faves

but I generally just yell "GEAR" then "OKAY"

I had the exact same problem, but calling it driver error when the inexperienced driver is your wife can cause other issues.  My solution was a $60.00 pair of gloves.  It let me get the grip to hold on no matter what the pull was.  The rest was me making adjustments by bending my knees more for the slow drag or pulling right back for the full throttle pull.  Have fun,

Killer wrote:

"make 'er talk!" is one of my faves

but I generally just yell "GEAR" then "OKAY"

"SPANK IT!"

"Boat Driver"