Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 71Get this manual
4Lubricate piston rings, piston and cylinder wall with ligh oi l 6Firmly press larger iameter half of locat ing washers (a) into grooves in cy li nder block
.il!.CAUTION
Be careful not to pinch your fingers between crankshaft and cylinder block when installing crankshaft assembly piston drops Into cylinder with very Utile force5Align piston ring end gaps with locating pins (a)6Keeping rankshaft horizontalguide piston into cy li nder