1994 Johnson/Evinrude "ER" 60 thru 70 outboards Service Manual, Page 111Get this manual
Principles of Operation Flywheel
f11 The flywheel contains the magnets which energize the charge
coil, power coil, and sensor coilsOnce the flywheel exceeds minimum cranking RPM, the flywheel's magnetic lines of force pass through the coil windings to produce voltage in those circuits
The flywheel hub magnets energize the sensor coils and the rim magnets energize the charge coil and power coilThe flywheel must be in good condition and correctly locatedIt controls ignition timing and output from the charge coil and power coilo