I have inherited a 1995 6.5 mercury trolling motor and I am trying to tilt the motor up but it won't tilt. Is there a locking pin, or lever or something or does it have to be in neutral or ????

If the unlatch mechanism on your MotorGuide Xi5 trolling motor is not working, you may be able to resolve the issue by following these steps:

1. Check the locking pin: The locking pin on the motor's deployment bracket may be preventing the motor from unlatching. Make sure the pin is in the unlocked position and that there is no debris or damage preventing it from moving freely.
2. Check the unlatch lever: The unlatch lever may be stuck or damaged. Try moving the lever back and forth to see if it can be freed up. If the lever is damaged, it may need to be replaced.
3. Lubricate the mechanism: If the locking pin and unlatch lever appear to be functioning properly, the mechanism may just be stiff or dirty. Try lubricating the mechanism with a silicone spray or other lubricant.
4. Check the wiring: It's possible that the issue could be related to a wiring problem. Check the wiring connections between the motor and the control head to make sure they are secure and free from any corrosion or damage.

If none of these steps resolve the issue, it may be necessary to take the trolling motor to a professional technician for further diagnosis and repair.

It is a simple but fiddly job. Examine where the arm rest hinges. There will be curved plastic covers. These should just pull up and off. It will reveal a silver pin with a black lock washer fitted on the end furthest from the door.
Using a pair of thin flat bladed screwdrivers and a LOT of patience, you should be able gradually lever the locking washer off the pin. If your careful you should be able to reuse the washer. Once the washer is off, the pin should tap out towards the door. The arm should lift up and out.
you might need to tilt the back of the seat to get better access.

check for a reverse lock tab that holds the motor down when reversing
with tilt control that tab should be release when up is selected

Try these guys..
http://www.mikesreelrepair.com/trolling-motor-parts/ or
http://www.jonestrollingmotor.com/

little lever at the bottom of the support housing ,Normally you would flick it down to stop engine dropping when your working on it but have a good look anyway something must be locking it and i think the best way is have a good look

You can get the appropriate pins in the prop not kits sold by minn Kota or thru major retailers.
Trolling Motor Replacement Props Minn Kota Motors
You will find prop nut kits here just follow the link.

most of these will come off if you lift the engine to fully up and lock the lever up to hold it there ! Then you can access the trim motor , clean off around it then undo and remove the motor after disconnecting the wires near the carbs !

They always lock in reverse. Sometimes the adjustment is slightly off.
adjust shift lever.

screwdriver lift locking arm on lock down rod and lift motor

YOU HAVE A SWITCH OR A TILT ACTUATOR MOTOR PROBLEM. LINCOLNS HAVE 5 OR 6 ELECTRIC MOTORS MOUNTED ON THE UNDERSIDE OF EACH FRONT SEAT WHICH REQUIRES REMOVING THE SEAT TO INSPECT .THEIR ARE ALSO CABLES ATTATCHED TO THESE MOTORS SO LISTEN WHEN YOU HIT THE TILT SWITCH DO YOU HEAR A MOTOR NOISE? IF YOU DO THEN YOU MAY HAVE A BAD CABLE.