2001 Mercury Mariner 50-60HP Factory Service Manual, Page 370Get this manual
MANUAL TILT ASSIST
Down Circuit
With the engine tilted up, the piston inside the accumulator piston (d) will be at the bottom of the accumulator (c) and the gas pressure is lowTo lower the engine, the camshaft lever (f) is rotated down, the internal cam will cause the push rods to open the accumulator check valve (e), both fast transfer valves (hj) and the down circuit slow transfer valve (i)The operator will have to press down on the engine cowl to overcome the pressure inside cylinderFluid will flow out of the bottom of the cylinder, past both the down circuit fast transfer valve (h) and down circuit slow transfer valve (i)Fluid will flow past the up circuit fast transfer valve (j), surge valve (k) and through the interconnecting passage into the top of the cylinder (l)Due to the shock rod (a), the tilt cylinder cavities differ in volume, the extra fluid from the up cavity [forced into the accumulator (c)] will cause the internal accumulator piston (d) to compress the gasWith the engine in the correct position, the camshaft lever is rotated up and the push rods allow the check valves (e, h, i,j) to close