1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 129Get this manual
& General Safety Warnings The 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 flywheel To prevent possible fire or explosion under the engine cover after servicing: aCheck entire fuel system for leaksbMake 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 insulation To avoid accidental starting of engine while servicing, take adequate precautions to disarm the ignition system: aConnect engine wiring harness to boat wiring harness with key switch in OFF position,'