2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Manual, PN 5005466, Page 91Get this manual
IGNITION COMPONENT SERVICING3.5
COMPONENT SERVICING3.5
Flywheel
IMPORTANT: 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 componentsFlywheels rarely go bad and would only be replaced as last resort in solving an ignition problem
Installation
Install the flywheel key with its outer edge parallel to taper of crankshaft