2008 Evinrude E-TEC 55MFE Technical Manual, Page 124Get this manual
ELECTRICAL AND IGNITION TACHOMETER CIRCUIT TESTS
TACHOMETER CIRCUIT TESTS
Check voltage at the batteryUse this reading as reference for battery voltage
FLYWHEEL AND STATOR SERVICING
IMPORTANT: Weak
flywheel magnets can cause low alternator output and affect outboard performanceWeak flywheel magnets can also cause low readings on ignition test equipment, such as peak-reading voltmeter, which might cause unnecessary parts replacementAn accurate test of alternator output can help determine the flywheel's conditionRefer to CHARGING SYSTEM TESTS on p114
Flywheel Removal
WARNING