Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 36Get this manual
TUNING Resistance Test (See the Wiring Diagram in the Appendix Use magneto analyzer, set on Scale No.2Clip the small red and black leads togetherTurn the meter adjustment knob for Scale No.2 until the meter pointer aligns with the set position on the left side of the "OK" block on Scale No.2Separate the small red and black leadsUse the Wiring Diagram in the Appendix, and check each wire for resistance between the harness connection and the terminal endsIf resistance exists (meter reading outside the "OK" block) the harness MUST be repaired or replaced2-12 WATER PUMP CHECK