1995 Johnson/Evinrude Outboards 50 thru 70 3-cylinder Service Manual, Page 303Get this manual
Component Description r:;;l Trim-up Relief ValveThis valve controls maximum oil pressure in the system during trim-outltilt-upIt also bleeds oil to the reservoir when the engine is run at speeds over 1500 RPM (approximately) in the partial-tilt positionThis allows the engine to return to the maximum trim-out position
movement of the engineWhen this screw is loosened, the engine will not move in the trim range
f31 Manual Release ValveThis device allows manual tilting
r;] Tilt Cylinder
This hydraulic cylinder moves the engine through the tilt range onlyIt also absorbs the shock of hitting an underwater object'sl Tilt Check ValveThis valve provides one-way oil passage the oil pump to the underside of the tilt position while trimming out and tilting upcylinder as it retracts when coming off shallow water drive modeThe valve also filters the oil
f31 Filter ValveThis valve supplies oil to the top side of the tilt
'sl Trim Check Valve CDThis valve, along with the trimtilt separation valve, isolates the trim cylinders from the rest of the system when the engine is not being trimmed or tiltedIt allows oil to flow from the pump to the underside of the trim cylinders during trim-out operationIt also allows oil flow to return to the pump and reservoir during trim-intilt-down operation'sl TrimTilt Separation Valve Q)This valve seals the underside of the trim cylinders from the underside of the tilt cylinder under forward thrust loads'sl Reverse lock Check ValveThis valve allows oil to flow the pump to the top sides of the tilt and trim cylinders during trim-intilt-down operationIt also allows oil flow to return to the pump during trim-outltilt-up operationIt also acts to prevent the engine from tilting up during reverse thrust loads