1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 214Get 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 Before working on or removing any electrical parts, disconnect the battery cables at battery to prevent electrical sparks Before returning the outboard motor to the owner, make sure: all electrical connections are tight, insulator boots and sleeves are in place, and electrical wires are routed and clamped in the original position Do not use jumper cables and booster battery to start engineDo not charge battery in the boat with an external chargerFumes vented during either operation can lead to an explosion Replace 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 equivalent