1998 Johnson Evinrude "EC" 90, 100C, 105C, 115, 150, 150C, 175 60 deg. LV Service Manual, P/N 520210, Page 116Get this manual
Flywheel Servicing
INote In
order to produce the voltage necessary to run an ignition system, the flywheel magnets must be of particular strengthWeak flywheel magnets can cause low ignition voltage which would affect engine performanceWeak flywheel magnets can also cause low readings on ignition test equipment such as the peak-reading voltmeter, which might cause unnecessary replacement of ignition componentsAn accurate test of alternator output can help determine the flywheel's conditionRefer to Running Test, Alternator Output, Section 7Removal
1To avoid accidental starting of engine, twist and remove all spark leads2Remove the timing sensor cover and rectifierregulator coverDisconnect the timing sensor plug3Rotate crankshaft clockwise to about 30 ATDe