1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 89Get this manual
Disassembly All screws addressed in this procedure are No15 Torx i when removing screws and releasing that pressure
The air motor cover is under spring pressureUse caution
r;J With No15 Torx screwdriver, remove the Torx screws the air motor coverTo control the spring pressure, place pump on your bench with the air motor cover facing upwardHold down on cover while removing screws
LJ holding
Set cover, screws, O-ring, and two springs aside Remove the Torx screws 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 pumpintermediate housing and air motor piston in one hand, and use the other to unscrew he fuel pistonpull gently with counterclockwise motion Remove the fuel piston and the air motor piston from the t!.I intermediate housingsteel washersSet the flapper valve and nylon washerretainer asideClean all parts with OMC Cleaning Solvent and inspect for wear and damageReplace any suspect parts