Yes, if I look at the water pickup location at the picture, it feels like it can be the cause of the prop slip.

But there is some people that say it has no effect at all.
One guy running his boat in 80mph with the water pickup on the ”wrong” side like mine.
But he has no problem with the prop slip, as far as he know..

maybe mine is standing out more than it should.. One guy told me it should point down just 0,5-1cm from the bottom





maybe I can cut it off a little bit..? If it points down more than 0,5-1 cm

I dont know if the water pickup should point down nothing at all at the ”inner” section.

Or if it should go even with the bottom of the transom and then a little angle..

If you know what I mean. Cut it off like this:





This guy told me to put it on the left side instead.
And his pickup is higher mounted than mine:

It looks like its carrying the bow not bad, I think Griff is right on, the six blade will lift the stern and not be a true test, and try removing the water pickup. As far as trimming the pickup, Teague Marine web page has installation instructions, it shows the leading edge flush with the bottom and the trailing edge 1/2" (127mm) down
If you have an engine issue, start there.

If the boat is fully trimmed up in the pic, it running way to wet for WOT and has too much rooster tail which equals more prop slip.
It should be running more like this with less wetted surface. The way to do that is lower the drive with a spacer to get more leverage too lift the bow

Thank you guys.
I thinking of move the pickup (just for testing) on the outside of the transom, under the extentionbox. Dont know it this is the right way to do it (just for testing). Otherwise I must trim it down a little bit like you said:






I dont know if the drive is fully trimmed up in the picture (my trim/tilt gauge to the drive trim doesnt work).
But in that trim position as in the picture, the boat starting to bounce (porpoising?) and sounds like rev limiter is going in and throwing a rooster tail.

Are you guys meaning that the boat is lifting the bow good or bad?
Im not good at this at all, sorry..

I read that a propp with high ”rake” is the best way for a boat with a high x-dimension..
What type of propp is a one with high rake?

sorry again for my questions..
/from a newbee that wants to learn more about this

Why not just use the water pickup in the outdrive to test??? I certainly would not be drilling another hole in the transom for testing.

The pic shows that the boat's running surface is in the water too much. The bow needs more lift to lessen the drag.
The boat should really not have any rooster at the attitude it running.

The prop needs to be deeper in the water to lift the bow.

It is plugged in the drive.
I mean just mount it on the outside somehow.
not drilling a new hole.. but dont know if its possible..

maybe just trim it down a little bit if it points down much.. but it feels like it is more than the water pickup that causing the propp slipp..?
like the high drive mount

Okey, so the whole boat must come up from the water more? And thats what the bow-lifting will do?

Maybe put the spacer on (0,5” thick), maybe the prop shaft must be lowered more than 0,5"..
And then a proppeller with high rake?

The spacer would be a good place to start, just try and make one change at a time so when you get the results you want, you know how you got there.
optimum trim would be your maximum speed at the desired RPM, you can feel it when you trim too high and the slip factor goes way up. the roost looks cool but not efficient (unless its a surface drive!)

You should not plug the drive. You want water to go through it and dump out somewhere. The water flow helps the drive run cooler.
No way you can temp move the water pick up. But you should trim it down slightly with the leading edge even with the hull bottom.

First thing I'd do is trim down the water pickup. Second would be to install the spacer.

I mean it is plugged in the transom assembly, not in the drive sorry...

I will do that before I install the spacer.
And then I should try the boat again with my Bravo 1 26P propeller to see how it reacts?