Once the drive is removed it's disconnect anything that attaches it to the hull. You have pretty much listed all that.
Many remove the bolts holding the front mounts to stringers, but I just remove the nut on top and leave the mount. In either case have to use alignment bar once motor is...
I hope the bore scoping shows something, but with it being unable to turn by the crowbar in either direction, I'm thinking seized bearing. If a rod broke or crank broke it should still move some if not one direction but would the other even a small amount.
Not as bad as a Silverton but did...
Glad your marina guy didn't break the crank shaft bolt
Don't know how many times someone has said, put a socket on the crank shaft bolt and see if you can move the motor, then they have yet another problem when it snaps off.
Hope they can find and fix the issue at least cost
Special cable which runs from the Bat direct to PCM connections on the motor
I have the Verado and 6.2 EC and both list clean power cables. This is Verado
Motor has to come out because there is a way to disconnect the tranny from the motor in the boat to test, but I don't know of anyone which would want to try it
Wish I had the manual but this is one I don't have
Unless another has an idea suggest contacting Merc (920) 929-5200 tech support tomorrow.
It most likely will hook up and go, but have seen several go from carb to MPI yes, but carb to MPI EC not yet. There are just more sensors and don't have...
My issue is I'm not 100% sure that your MPI is a EC (CAT exhaust) motor or not. I believe the only 3.0 MPI's were EC motors so I'll just go with it is unless identified otherwise. The EC motors have 6 different service manuals
The motor should have a 10 pin CAN connector which provides info to...
Diagram #1 will work but;
The kicker most likely doesn't have enough of an Alternator to be able to charge both Bats if that is needed. The down riggers shouldn't draw a Bat down enough to worry about. Keep down riggers on Bat 2 and not connected to the switch
With Diagram #1 just leave switch...
While it could be the motor or transmission which could lock the motor. The prop shaft turns easy so that leaves the motor.
Motor oil is clean "and note IT IS NOT high" on dipstick
Only thing left is the motor