Last time out ( I hit 112 MPH ) I lost almost all water presssure - I didn't have a lot at speed ( 25 PSI ) but suddenly lost pressure to almost nothing. I figured since the drive height was WAY UP THERE the pick up was out of the water at top speed ( it is using a straight edge ) Anyway I figured that I toasted the seawater pump.
Well I took it apart tonight and the impellar needed to be replaced ( I did ) but it wasn't toasted.
SO what else could have caused this? I started looking and found that the water hose had blown out of the helmut.
So I am going to pick of a new swedge fitting tomorrow.
DO I need to put bellows adhesive on the hose before I push it into place. ( it is sticking way out of the hole now)

I use yamabond. Get it at a Yamaha motorcycle dealer. Use the gray.

Picked up a new insert fitting and some bellows adhesive today. Pulled the outdrive, cut off about 3/4 inch of hose and cleaned and coated both parts and installed the insert.
While I had it apart this far I rebuilt both trim rams. ( Somehow I am getting water in the oil )

I had the same problem (no where near 112mph &#128532 my impeller looked good, as did the housing. I replaced it... Problem solved.

My impeller was not bad but I did replace it and the housing. When I saw the impeller I knew that it wasn't the problem. I then went looking and found the hose blown out of the helmet. Their wasn't any bellows adhesive on it and the insert was installed about 1/2 inch too far. I cut the hose off about 3/4 inch, covered both parts with bellows adhesive and then installed a new insert with the hose sticking out about 1/8th inch and the insert just beyond flush to the housing.

Sounds like your summer is going as great as mine! It sure is fun to make lots of changes all at the same time, ha!

You got that right.
Did you have to learn how to drive the boat all over again?
I made so many changes that it almost isn't the same boat.
It handles different, It rides different, It stays on plane at a lower speed ( due to the bottom repairs) It is a LOT faster. OH and did I say it is a LOT faster.
That and the same prop ( tinkered with stock Bravo 28 ) that I turned 6000 RPM with a 1.5 ratio drive at 94 I am now turning 6100 at 112 MPH with a 1.34 ratio drive.

There shouldn't be any adhesive on that hose. It just has the simple plastic insert. If it was installed to far I can see that it might push out. Be sure that the water hose is still long enough when you turn and trim the drive. Since you cut it shorter it might put some extra tension on it

I checked for length. I don't trim much being a cat and turning it was fine. I did use Bellows adhesive.