2002-2004 Mercury 40HP, 50HP, 60HP, Factory Service Repair Manual, Page 347Get this manual
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Reservoir Oil Filtered Feed Oil Return Oil Oil Under Pressure
Impact Relief Pressure #22 880 1110 psi (30 60 hp) 1220 1420 psi (75 125 hp) Tilt Relief Pressure 250 400 psi (30 60 hp) 500