Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 85Get this manual

Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 85

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IGNITION
NOTE: ECMs are capable of performing cylinder misfire test to isolate problem cylindersOnce suspect cylinder is located, an output load test on the ignition coil, fuel injector and dire