1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 117Get this manual
Ignition Component Replacement
i twist and remove all spark plug leads
'" 1To avoid accidental starting of engine while servicing, Remove the screws retaining the ignition component that is being replaced
If the charge coil or ignition module is being replaced, separate the bullet connectors underneath the ignition module
4Remove the wire clamp from the ignition plate
L!J from the powerhead
Loosen the five ignition plate screwsLift the ignition plate
Remove the plate from bottom of the ignition plate
7Remove the leads from the spiral wrap and from the ignition component