Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 343Get this manual
MANUAL TILT ASSIST
Shock Function (Valves Closed)
Should the drive unit strike submerged object while in forward motion, the shock rod (a) will extend from the cylinder (I)Oil inside the up cavity is locked in static position by the closed up ci rcuit fast transfer valve G)the closed down circuit slow transfer valve (i) and closed down circuit fast transfer valve (h)Fluid wi ll attempt to exit the cylinder through the interconnecting passage back into the accumulator (c)The closed up circuit fast transfer valve will prevent the fluid returnAs th shock rod extends outward, the pressure inside the up cavity wi ll reach sufficient pressure to open the shock valve (p) which opens at 880-1110 PSIOil will flow into the cavity created as the shock rodshock piston (n) moves away from the memory piston (m)