1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 144Get this manual
General Safety Warnings
Before working on any part of the powerhead, read the section called Safety at the end of this manualThe engine cover is machinery guardUse caution when conducting tests on running enginesDo not wear jewelry or loose clothingKeep hair, hands, and clothing away from rotating flywheelTo prevent possible fire or explosion under the engine cover after servicing: Check entire fuel system for leaks Make sure all electrical and ignition leads are routed and clamped in their original positions away from rotating engine parts which could cut or abrade wire insulationTo avoid accidental starting of engine while servicing, take adequate precautions to disarm the ignition system: Connect engine wiring harness to boat wiring harness with key switch in OFF position Twist and remove all spark plug leads from spark plugs Disconnect the battery cables at the batteryReplace any locking fastener (locknut or patch screw) if its locking feature becomes weakDefinite resistance to tightening must be felt when reusing locking fastenerIf replacement is indicated, use only authorized replacement or equivalentTo prevent sudden movement when starting engine and possible "man overboard" situations, test the "start-in-gear prevention" feature before returning engine to customerU