Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 177Get this manual
CLEANING AND INSPECTING
20- Hold the armature plate and separate the coils from the plateAs the coil is separated from the plate, observe the hightension lead to the spark plug inside the coilWork the small boot, if used, and the high-tension lead from the coilCLEANING AND INSPECTING
A coil destroyed when the side blew outThis damage was caused when 12-volts was connected to the magneto circuit at the key switch
Inspect the flywheel for cracks or other damage, especially around the inside of the center hubCheck to be sure metal parts have not become attached to the magnetsVer if each magnet has good magnetism by using screwdr iver or other toolThroughly clean the inside taper of the flywheel and the taper on the crankshaft to prevent the flywheel from "walking" on the crankshaft while the engine is runningCheck the top seal around the crankshaft to be sure no oil has been leaking onto the armature plateIf there is ANY evidence the seal has been leaking, it MUST be replaced, as outlined earlier in this section