the noise was not there until I had the boat out a few times this is a new boat to me this year the merc dealer thought it was u joints that was also my first suspicion then we tried gimble bearing then we went through the upper new bearings still same noise thats when we tried a known quiet outdrive he had in the shop same noise
At this point I think I will have him run it with the outdrive off and recheck alignment not sure what else could be causing it

I suggested running it without the drive in post #4.

Sorry I missed that

Just informing you that it had been suggested earlier.

update greased the coupler same noise but after 2 times out noise seems to have diminished to quiet when wheel is straight and about the same when cut hard in either direction could this be the grease working its way in or is this just a coincidence?The other question is do I need a new coupler to completely fix this?

Cut hard in either direction is usually the gimble bearing. My IMHO. Smaller chance U-Joints, which typically make more noise up and down or if real wasted....all the time.

did new ujoints then we tried mercruser part new gimble bearing then tried another new one in case maybe it was bad since the noise is gone straight on this is some kind of improvement so not sure what is causing this to happen?

Did you ever check to see if the alignment tool was parallel to the bottom of the boat?

From what you say above that after greasing coupler it's a little quieter, maybe you might want to pull drive off and look at coupler with a flash light. Check to see if teeth have become warn and pointy or the teeth are full of dry grease and metal.

You requested that this post be deleted because your problem has been solved.
There is no reason to delete the thread. If we/mods deleted every thread where a tech problem was solved, nobody would ever learn anything.

Post whatever solved the problem. It may help somebody else later.