1968 Evinrude Speedifour, Starflite 85HP Service Manual, Page 48Get this manual
necting rod in position, then proceed to drive press the pin into pistonSee inset, Figure 5-29This accornplished easily if the piston is heated slightly, causing it to expanddReplace retaining rings, rnaking certain they to rest securely in the groove provided for this purposeCheck piston with rnicrorneter to deterrnine whether piston has been distorted during assernblySee Figure 5-30If slightly out-of-round, tap high side with light rnallet (DO NOT use harnrner) to store original roundness Proceed carefully and frequently until the piston is rounded out Figure 5-28Checking Ring Groove Clearance intake side of deflector toward intake Oil hole in connecting rod must toward top of motorSee Figures 5-29 and 5-31Figure 5-30Checking Piston for Roundness PISTON RINGS Install the piston rings each pistonSpread each ring with ring expander just enough to slip it over the head of the piston and down into placesure the rings fit freely in the piston ring grooves