Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 58Get this manual
POWERHEAD
Tap the piston out of the cylinder from the crankshaft sideImmediately attach the proper rod cap to the rod and hold it in place with the rod boltsThe few minutes involved in securing the cap with the rod will ensure the matched cap remains with its mating rod during the cleaning and assembling workIdentify the rod to ensure it will be installed into the cylinder from which it was removedRemove and identify the other rod caps, needle bearings and cages, and rods with pistons, in the same mannerDISASSEMBL Before separating the piston from the rod, notice the location of the piston in relation to the rodObserve the hole in the rod trough on one side of the rod near the wrist pin opening and another at the lower endThese holes must face toward the TOP of the engine during installationObserve the slanted edge and the sharp edge of the dome-type pistonThe slanted edge MUST face toward the exhaust side of the cylinder and the sharp edge toward the intake side during installationWhen the rod is installed to the piston, the relationship of the rod can only be one wayThe rod holes must face upward and the piston must face as described in the previous paragraph