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Home >> Mercury >> 1980 >> Bobcat Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> MOTORCRAFT DURA-Spark II Ignition Systems >> Testing >> Ignition Coil Resistance Check >> Primary Resistance

Primary Resistance

Remove connector from coil's positive and negative primary terminals. Be sure ignition switch is "OFF". Set an ohmmeter on the low scale and connect ohmmeter leads to negative and positive terminals of ignition coil. Ohmmeter reading should be 1.13-1.23 ohms at 75° F. With temperature of coil at 200° F, a 1.5 ohm reading is acceptable.

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