1967 Evinrude StarFlite 80 HP Outboards Service Manual, PN 4359, Page 52Get this manual
necting rod in position, then proceed to drive the pin "home"This can be accomplished more easily if the piston is heated slightlycausing it to expanddRe place retaining rings, making certain they come to rest securely in the groove provided for this purposeeCheck piston with micrometer to determine whether piston has been distorted during assemblySee Figure 5-30If slightly out-of-round, tap high side with light mallet (DO NOT use hammer) to restore original roundnessProceed carefully and caliper frequently until the piston is rounded out Figure 5-28Checking Ring Groove Clearance intake side of deflector toward intake portOil hole in connecting rod must be toward top of motorSee Figures 5-29 and 5-31Figure 5-30 Checking Piston for Roundness
PISTON RINGS
OIL HOLE
Install the piston rings on each pistonSpread each ring with ring expander just enough to slip it over the head of the piston and down into placeBe sure the rings fit freely in the piston ring grooves