1976 Johnson 4HP 4R76, 4W76 Outboards Service Manual, Page 40Get this manual
dDrive two taper pins out of rankcase and cylinder block assemblyThe taper pins must be driven out from the back to the front of the crankcaseSee Figure 5-6Remove eight screws attaching crankcase to cylinder block gRemove connecting rod caps, and lift crankshaft from cylinder blockRe-install caps on connecting rodsE:!iNOTE Pistons and connecting rods are wearing parts and seat with the operation of the motorBecause of this, it is essential to maintain their original positions at reassemblyMark each connecting rod and cap, piston, and bearing component to assure correct mating when they are reassembledAlso mark the cylinder from which they were removedhRemove magneto cam from crankshaftSee Figure 5-8Remove flywheel key only if damagedRemove seal and needle bearing assemblyE]NOTE
28 needles are not retained in bearing
Figure 5-6Removing Taper Pins eSeparate cylinder and crankcase halves by tapping the top of the crankshaft With rawhide or plastic malletSee Figure 5-7
Figure 5-8Magneto Cam, Key, Seal and Bearing