1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 96Get this manual
Principles of OperationCD II Flywheel
The flywheel contains permanent magnets which energize the charge coil, sensor coil, and alternator statorOnce the flywheel exceeds minimum cranking RPM, the flywheel's magnetic lines of force pass through the ignition plate components to produce voltage in those circuits
The flywheel must be in good condition and correctly located to ensure proper ignition timing and sufficient charge coil outputCharge Coil
The charge coil consists of many windings of wire wrapped around metal laminationOnce the flywheel exceeds minimum cranking RPM, the flywheel's magnetic lines of force pass through the charge coil windings to produce approximately 300 volts of alternating current