1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 81Get this manual
7Carefully snap oil piston and link onto stem of fuel piston screwPlace drop of oil on oil piston seal
[] 8Position a-ring seal around fuel inlet housing flangePosition fuel inlet housing over oil pump piston, and insert piston into oil pump bore
9Push fuel inlet housing (with a-ring) down against intermediate housingRotate back and forth slightly to seat -ring seal in groove and align screw holes in flanges
10Insert and tighten Torx screwsSee Replaceable Fittings General Procedures, this section, for thread forming screw installation precautions