

hey every one !! back for another summer of fishing !!!
the motor is a 1984 50 HP Johnson - J50TLCM
so i just have a couple questions/problems i would like to straiten out , so i can hit the water , i have attached 2 pics , hope they worked , the one is the electric tilt actuator nut on the top , which threads onto the top of the actuator on the one side which is held on to the motor with a SS bolt , my question is , what is this nut called and/or what is the part number ?
second pic is of a fuse on the back side of the motor , the one with the white flag on the wire , it keeps blowing , can any one tell me what this fuse is for ?
thanks to every one for any help or suggestions