Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 292Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 292

POWER TRIM
Maximum Tilt
With the piston rod at maximum traveland due to no rod movement, the pressure inside of the trim cylinder (w) will increase to the pressure required to move the tilt relief piston (s)The tilt relief piston 's "pin" opens the tilt relief valve (r)Up pressure flows into the trim relief passage, and returns back into the reservoir

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