2001 Mercury Mariner 50-60HP Factory Service Manual, Page 320Get this manual
POWER TRIM
Power Trim Flow Diagrams
TRIM UP CIRCUIT
Reservoir Oil Filtered Feed Oil Return Oil
Up Pressure 1625 psi (30 60 hp) 2800 psi (75 125 hp) mininmum
Oil Under Pressure
Impact Relief Pressure #22 880 1110 psi (30 60 hp) 1220 1420 psi (75 125 hp)