1991 Johnson/Evinrude EI Outboards 2.3 thru 8 Service Manual, Page 157Get this manual
L!!J expander just enough to slip it over the head of the piston and down into place5Coat the piston and cylinder bore with oil
r:;;l 4Install piston rings on pistonSpread each ring with ring
L!!J Make certain that the rings are correctly positioned in their
grooves with respect to the dowel pinsDamaged pistons and broken rings may result from imperfect alignment of the ring gap and the dowel pinsThe piston rings must be correctly located on their dowel pins to prevent permanent powerhead damager;;;lg 7Startthe piston into bore of the cylinder with deflector of the piston (sharp edge) toward intake port side of the cylinder blockAfter pistons are installed, loosely install the cylinder head to prevent the pistons from falling outr:;;l
r;;;l 6Place the piston in OMC Ring Compressor PIN 327017