1994 Johnson/Evinrude "ER" CV 85 thru 115 outboards Service Manual, Page 304Get this manual
Trim IIINII ITiit IIDOWNII Mode
Isl When the hydraulic unit is in the trim "in"tilt "down" mode, the hydraulic fluid is routed in the
following manner: 1Hydraulic pressure is directed to the reverse lock check valve side of the pump control piston causing the piston to open the trim check valve
2Fluid then opens the reverse lock check valve against very light spring tension and flows through the valve to the top of the trim and tilt cylinders3Fluid returning from the bottom of the tilt cylinder opens the trimtilt separation valveflows through the open valve, then through the open trim check valve, and back to the pump4Fluid returning from the bottom of the trim cylinders flows through the open trim check valve and back to the pump5Because of the volume of fluid displaced by the tilt and trim rods, less fluid is required above the tilt and trim pistons than is being supplied to the pump from beneath the pistonsSome of the fluid from the outlet side of the pump is returned to the reservoir through the trim-down pump relief valve 6If the switch is held in the down position after the trim and tilt rods are retracted, the pressure buildup will open the trim-down pump relief valve and thefluid will be directed back to the reservoirThis valve opens at approximately 800 psi (4200 kPa)7When the hydraulic unit is tilting downtrimming in, or when the engine is running in reverse gear, the following valves must hold pressure: Shock absorber valves, tilt cylinder Manual release valve Reverse lock check valve Filter valve