1968 Evinrude Big Twin, Big Twin Electric, Lark 40 HP Outboards Service Manual, Page 73Get this manual
Figure 6-55TILT FRICTION
Friction Adjustment
Figure 6-54Steering Friction Adjustment
The stern bracket tilt shaft, with conical washers andspring loaded nut, provides adjustment to help hold motor in tilted position while beaching or launching boattilting lock pin pushed in to hold motor in fuH tilt positionSee Figure 6-55Tighten the nut against spring tension to hold the motor in tilt position, but loose enough so motor returned to drive position without effort