1971 Johnson 125HP outboards Service Manual, Page 10Get this manual
2-3 Merc-O-Tronic with Capacitor Discharge Adapter Model 55-980 Operating Amperage Min- Max1.4 Primary Resistance Min- MaxSecondary Continuity Min- Max2226
Graham Tester Model 51 Secondary Continuity Primary Continuity Coil Index Coil Test (Normal)Coil Test (Amplified) Gap Index
3000 ohms maximum 12 ohms maximum 60 minimum 80 minimum 50 maximum