Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 60Get this manual
POWERHEAD
TAKE CARE not to lose any of the bearings when the wrist pin is driven free of the pistonAlternate Removal Method If the piston does not have the "L" or the word LOOSE stamped, the wrist pin may be driven out in either directionIf an arbor press or cradle is not available, proceed as follows: Heat the piston in container of very hot water for about ten minutesHeating the piston will cause the metal to expand ever so slightly, but ease the task of driving the pin outAssume sitting position in chair, on box, whateverNext, lay couple towels over your legsHold your legs tightly together to form cradle for the piston above your kneesSet the piston between your legs with the LOOSE side of the piston facing upwardNow, drive the wrist pin free using drift pin with shoulderThe drift pin will fit into the hole through the wrist pin and the shoulder will ride on the edge of the wrist pinUse sharp hard blows with hammerYour legs will absorb the shock without damaging the pistonIf this method is used on regular basis during the busy season, your legs will develop black-andblue areas, but no problem, the marks will disappear in few days