Mash on it,

I think to really get balls deep into coming up with a direction, I would install a water pressure gauge in the suction piece to see what is doing what....

IMHO starting point;

Ride plate at 0 degrees

It sounds to me like the loader is deep, but a pressure gauge will tell you that with a higher than expected reading. Don't forget to through bolt these badboys...they take a beating and when they come off, it's huge.

I like to get the first pressure reading with a standard rock grate, it is a good starting reference.

40-45 would be much lower than what I would expect...GPS is a must if you really want to squeeze every ounce of performance out of it.

Anything else is just a W.A.G.   

Good hunting!

GT

Mash on it,

The first thing I can recommend you do is to climb under there with some 80 grit aluminum oxide sandpaper and get rid of the flaking paint an rough surfaces...This may not be noticeable right away, but it will help

Also be careful with the old style Diverters, they hang down quite a ways and while not a big deal on the JC bowl, the ca hook water when all the way down...

Looks like you have a lot to work with there though 

GT

  I run with the diverter all the way up......about a 1 foot rooster (like my bowrider, no diverter)

Have no clue on the intake fins, prev. owner said gs marine added the hardware, idk.
Do I need better pics?

thanks
Daniel

OK, THAT'S better! Whew, looked to me like the intake was all jacked up!  here it's the loader. WAYYYYY to low looks like. 

Ray

This is what I was referring too....

the jamb nut is siezed on the cable, thats where the "old "adjustment was,
I threaded the heim joint down for more roost, only bout a foot (now).
loader looks like its hanging down bout 1/2"- 3/4" from the keel


First pic "up" ,
second "down"

GT
sent pm

Daniel