2001 Mercury Mariner 50-60HP Factory Service Manual, Page 368Get this manual
MANUAL TILT ASSIST
Up Circuit
With the engine in the down position, the accumulator piston (d) will be at the top of the accumulator (c) with the gas at maximum pressureTo raise the engine, the camshaft lever (f) is rotated all the way downThe internal shaft connected to the camshaft lever will move the push rods, opening the accumulator check valve (e), both fast transfer valves (hj) and the down circuit slow transfer valve (i)As the operator lifts the engine, oil, under pressure inside the accumulator, will flow around both the slow transfer valve (i) and the down circuit fast transfer valve (h)Oil flows into the bottom of the tilt cylinder forcing the memory piston (m) into the shock piston (n) and then forcing the shock rod up and outOil above the shock piston exits the cylinder (l) through an interconnecting passage along side of the cylinder and returns into the manifold (g)Inside the manifold the oil flows past the groove in the surge valve (k), through the up circuit fast transfer valve (j) and mixes with the oil flowing from the accumulator into the up cavityWith the engine in the correct position, the camshaft lever (f) is rotated up and the push rods allow the check valves (e, h, i,j) to closeThe closed check valves prevent the oil from traveling between cavities and locks the engine into position