2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 83Get this manual
IGNITION FLYWHEEL
FLYWHEEL
The flywheel magnets must be of particular strength to produce the voltage necessary to run an ignition systemWeak flywheel magnets can cause low ignition voltage and affect engine performanceLow ignition output readings on ignition test equipment such as the peak-reading voltmeter can lead to unnecessary replacement of ignition components
Apply Moly Lube to threads of pressing screw and center hole of crankshaft
Removal
WARNING
&Assemble the flywheel using the Universal Puller Set, PIN 378103:
To avoid accidental starting of engine, twist and remove all spark leads