If the water was that high your starter, battery cables and alt are done for. Remove the drive and drain the water from the bellow and grease the gimbal bearing.

Now to service the pump remove the...

https://www.youtube.com/watch?v=lfDL30X-r70

5.0 will bolt right in, 4.3 will accept the rear housing but you will have to fab up new front motor mounts. Drive gear ratio will need changing to 1.85 . The 1.50 is a bit much for the 5.0

like I said, put power to the motor wires. if it runs ,reverse the power wires and it will run in the reverse direction. That said, the replays may be missing the power connection...

If you only have 2 motor wires you may have a reversing motor like OMC.Do you have relays or solenoids?
Apply power to the 2 motor wires , + to blue - to green, reversing the wires reverse the ...

Any particular mercuiser v8 engine you refering to?

If it goes all the way down your good, all the way up in trailer mode is good. If you mean the trim up/out stops too soon ,that adjustable. From fully down to the upper trim limit stop is 20 3/4 of...

Yes the dope does it again .authorizing e-15 fuels
...

Care to rell us what motor?

No more than 2 threads visble

I agree, a loose/worn shift spool, the upper shoe cannot go past 1200. When is does all your adjusting will give you F or R but not both

deck lights, cabin lights, stereo, stereo amps , etc

if its blowing the ign fuse what accessories are connected to the purple ign wire

carb, TBI,MPI?

I personally put it in gear but can find no mention in the manual , it just says lift out.

Dont really need it . do the procedure to see how much play there is . there should be very little rotation of the shaft.install the upper shoe and shaft then check to see is fwd is exactly at 1200....

Do the procedure to test for excessive play in the shift spool
see post 3

shift spool in in the lower unit. shoe in the upper is usually held by a cotter pin and washer.
To remove the shift rod,buy or make the tool to unscrew the shift shaft bushing. When unscrewing it ...

https://i.postimg.cc/zb14Yfbq/Screenshot-2022-05-16-at-18-26-36-06-Drives-R-A1-83-90-pdf.png

Yes, they can be easily replaced