1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 96Get this manual
Flywheel Servicing INotel,n 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 could affect motor performanceWeak flywheel magnets can also cause low readings on ignition test equipment such as the peak-reading voltmeter which may cause unnecessary replacement of ignition componentsAn accurate test of alternator output can help determine the flywheel's conditionSee Running Test, Alternator Output, Section 7Removal
1To avoid accidental starting of engine while servicing, twist and remove all spark plug leads