1965 Evinrude SportFour Heavy Duty 60 HP Outboards Service Manual, 4204, Page 48Get this manual
cInsert wrist pin through slip fit side of pistonOil wrist pin bearing in connecting rod Place connecting rod in pOSition, then proceed to drive the pin "home" This can be accomplished more easily if the piston is heated slightly, causing it to expanddReplace 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 5-27 If slightly out-of-round, place in fixture and tap high side with light mallet (DO NOT use hammer) to restore original roundnessProc eed carefully and caliper frequently until the piston is rounded out 2.084
Figure 5-25Checking Ring Groove Clearance PISTONS, WRIST PINS, AND CONNECTING RODS aThe difference between port and starboard cylinders must be considered when assembling pistons to rodsPistons must be installed in cylinders with intake side of deflector toward intake portOil hole in wrist pin end of connecting rod must be toward top of motorSee Figures 5-26 and 5-28bApply coat of oil to wrist pin, making sure surface is cleanPlace drop or two of oil in each pin hole in the pistonFigure 5-27Checking Piston for Roundness PISTON RINGS Install the piston rings on each pistonSpread each ring with ring expander just enough to slip it over the head of the pi ston and down into place Be sure the rings fit freely in the piston ring groovesThe ring grooves are pinned to secure the position of the ringsprimarily to prevent ends of the rings from catching on the edges of the ports in the cylinders, but also to assure staggering of the ring gaps