1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 111Get this manual

1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 111

Principles of Operation Flywheel r:;-J The flywheel contains permanent magnets which energize charge coil, sensor coil, and
metal 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 r:;] The 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 SLOW TM warning system, which limits engine speed to approximately 2000 RPM if engine