1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 112Get this manual
Principles of Operation Rywheel
The flywheel contains permanent magnets necessary to energize the sensor and charge coilsOnce the flywheel exceeds minimum cranking RPM, the flywheel's magnetic lines of force passing through the sensor and charge coil windings produce voltage in those circuits
When the flywheel is in good condition and correctly located, it controls ignition timing and charge coil output All ModelsThe sensor magnets are in ring around the flywheel hub and the charge coil magnets are in the flywheel rimCharge Coil (Stator and Charge Coil Assembly)
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, cutting through the charge coil windings, produce between 200 and 300 volts of alternating current (VAC)This voltage is supplied to the power pack to operate the ignition systemSensor Coil (Timer Base and Sensor Coil Assembly)
rn rn around metal laminationOncemanyflywheel exceeds The sensor coil consists of windings of wire wrapped the