1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 257Get this manual
Description of System
hydraulic unit consists of manifold that contains all valving, fluid reservoir, pump, motor, and cylinderThe hydraulic unit pivots on the lower thrust rod and the piston rod attaches to the underside of the engine swivel bracketAs the cylinder begins to extend, the first 15 of engine movement is considered the trim range because the swivel bracket is supported by the port and starboard stern bracketsAs the cylinder continues to extend, the remaining 50 of engine movement is considered the tilt rangeTotal engine movement is 65The engine can be manually raised or lowered through its entire trim and tilt range by opening the manual release valve minimum of three turnsWhen this cycle is complete, the manual release valve must be closed and tightened to 45-55 inIbs(5-6 Nm) before normal operation can be resumed