1974 Johnson 25HP Outboards 25R74 25E74 Models Service Repair Manual JM-7406, Page 10Get this manual

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2-3 Graham Tester Model 51 Maximum Secondary 20000 Maximum Primary 14.0 Coil Index 50 Minimum Coil Test 24 Gap Index 45 Ohmmeter Test SECONDARY (igh Ohms) 13500
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