1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 87Get this manual
Disassembly
All screws addressed in this procedure are No15 TorxThe air motor cover is under spring pressureUse caution when removing screws and releasing that pressure
With No15 Torx screwdriver, remove the Torx screws holding the air motor coverTo control the spring pressure, place pump on your bench with the air motor cover facing upward Hold down on cover while removing screwsSet cover, screws, O-ring, and two springs asideRemove the Torxscrews attaching the inlet housing to the intermediate housing and separate these partsAs you lift the inlet housing, the oil piston will be drawn out of the oil pump