1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 305Get this manual
MANUAL RELEASE 1The engine can be manually raised or lowered through its entire trim and tilt range by opening the manual release valveTo operate the manual release valve, turn valve slowly counterclockwise with screwdriver until it lightly contacts its retaining ringabout 3112 turns
2When the manual release valve is open and the engine is manually lowered, fluid flows from below the cylinder pistonbypasses the UP check valvepasses through the manual release valveand flows into the reservoir through the passage
As the cylinder piston moves down, the filter valve cylinder