2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 129Get this manual
IGNITION IGNITION PLATE Align the flywheel keyway and install flywheelCoat the threads of the flywheel nut with Gasket Sealing CompoundInstall the nut and torque to 100 to 105 ftIbs(136 to 142 Nm)Remove the screws retaining the ignition component that is being replaced
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Remove the wire clamp from the ignition plate
IMPORTANT: After replacing any major ignition
component, make sure the maximum spark advance is correctRefer to Maximum Spark Advance on p71