1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 124Get this manual
General Safety Warnings
Before working on any part of the ignition system, 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 flywheelBefore working on or removing any electrical parts, disconnect the battery cables at the battery to prevent electrical sparksAvoid accidental starting of engine while servicing; twist and remove all spark plug leadsAvoid electrical shockPerform all ignition coil high voltage tests on wooden or insulated bench top, Do not handle coil tester leads during output test, Do not touch ignition coils or spark plug wires when the engine is being started or while it's runningLessen the possibility of fire and explosion under the engine cover; make sure electrical wires are routed and clamped in their original positions, away from rotating parts which can damage wire insulationIf you've removed the spark plugs, keep the spark tester away from the open spark plug holesReplace 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 an authorized replacement or equivalent