1977 Johnson 2HP Outboards Service Manual, Page 41Get this manual
5-7 UPPER MAIN BEARING AND OIL SEAL Instal1 upper main bearing through bottom of crankcasePress against 1ettered side of bearing case until bearing is recessed 1 16" (1.5 be10w finish thrust face of crankcase Avoid 10ss of need1es in upper main bearingNOTE Instal1 sea1, lip down until flush with top of rankcase PISTON INST ALLATION Coat piston and cylinder bore with and instal1 piston and connecting rod assembly through crankcasePush piston through cylinder until piston grooves are exposedThe intake side of the piston deflector must p1aced toward the intake portFigure 5-19 PISTON RINGS Instal1 the piston rings pistonSpread each ring with ring expander just enough to slip it over the head of the piston and down into p1ace Figure 5-20sure rings fit free1y in the piston ring groovesThe ring grooves are pinned secure the position of the rings primarto prevent ends of the from catching the edges of the ports in the cylinder, but a1so to sure staggering of the ring gaps Careful1y press piston and into cylinder bore head of piston is flush with top of cylinder NOTE Do not press beyond this at of cylinder or 10wer ring will 10ck into recess