Y2,

That depends on which trolling motor you have. Now if it is a MG there will be 4-Jack nuts that the screws thread into and a nylon insert lock nut attached at the bottom of the thread. You have to unscrew the front panel to beable to reach them. Most of the screws are phillips drive so you will need a phillips drive screw driver to loosen them while holding a wrench below on the nuts. Or vice a versa whichever is easier. The nuts are normally 1/4-20 thread and the wrench size you will need for the nut is 7/16.

Hope this helps,
Russ

AHA! Fell for the old "There is a special tool "ploy huh?
I believe you can also use a long rathet extension and let it lock up against the cap or hull from underneath as you turn the screw from the top...it is a wrestling match depending on the room and access. Now I hav'nt done it for awhile but that is what we did with my Gambler.

p.s. make sure they do not stress fracture the mounts on the fibreglass cap.