1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 71Get 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 [1Q]
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 precautions1IIl11Put grease on vacuum port a-ring and place in recess Place air motor spring on piston