1993 Johnson Evinrude "ET" 60 degrees LV Service Manual, P/N 508286, Page 225Get this manual
it General Safety Warnings Before working on any part of the electrical system, read the section called Safety at the end of this manualThe timing wheel cover is machinery guardUse caution when conducting electrical tests on running enginesDo not wear jewelry or loose clothingBefore working on or removing any electrical parts, disconnect the battery cables at the battery to prevent electrical sparksBefore returning the 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 their original positionsDo not use jumper cables and booster battery to start the engineDo not charge battery in the boat with an external chargerFumes vented during either operation can lead to an explosionReplace 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