1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Manual, P/N 507122, Page 110Get this manual

1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Manual, P/N 507122, Page 110

Principles of Operation Flywheel the charge coil, sensor coil, and alternator statorOnce the flywheel exceeds minimum cranking
laminationOnce the flywheel exceeds a minimum cranking RPM, the flywheel's magnetic lines of force cutting through the sensor
coil windings produce approximately voltsThis voltage is supplied to the power pack to control small electronic switches
(SCRs) which, in turn, direct power pack output to the correct ignition coil primaryPower Pack power pack has several basic
functionsIt stores and distributes the voltage received from the charge coilThe power pack uses electronic switches (SCRs),
activated by sensor coil output, to select the correct ignition coil primary winding for firing 20 thru 30The power pack
has an RPM counting and RPM limiting circuit to protect the engine from damage due to severe overspeeding20 thru 30The power
pack incorporates the S.L.OWTM warning system, which limits engine speed to approximately 2000 RPM if engine temperature