2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 269Get this manual
Outboard Emergency Stop System and Safety
The emergency system begins here at the clip and lanyard
and ends here in the ignition system on the powerhead
What is most important?
The emergency stop system must STOP the engine when the clip is removed or the lanyard pulled from the emergency stopkey switch