1992 Johnson Evinrude "EN" 90 deg. Cross V Service Manual, P/N 508145, Page 105Get this manual
Sensor Coil (Timer Base and Sensor Coil Assembly)
f21 The sensor coil consists of many windings of wire wrapped t=J around 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 (SCR's) which, in turn, direct power pack output to the correct ignition coil primary V4The timer base has four sensor coils; one per cylinder V6The timer base has six sensor coils; one per cylinderPower Pack
] The power pack
has three major functions:
The power pack receives its operating voltage from the charge coil and converts it into direct current for storage The power pack stores this direct current in capacitor The power pack uses series of electronic switches (SCR's), activated by sensor coil output, to select the correct ignition coil primary winding for firingThe power pack has one SeR for each ignition coil it controlsKey Switch