Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 209Get this manual
SHOCK FUNCTION RETURN
Reservoir and Feed Oil
Oil Under Pressure
Return Oil
aElectric MotorTrim RamImpact Relief ValveShock PistonMemory PistonManifoldSuction SeatDown Pressure Operated Valve i-Tilt Relief ActuatorManual Release ValveTilt Reliel ValveUp Pressure Operated ValveDown Circuit Feed Valve