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The front tach indication was intermittent, then failed altogether. I swapped the front and rear engine magnetic pickup connections to the tach gauge and proved that the fault was not in the gauge. I verified wiring and connections to the front magnetic pickup were good, then removed the pickup from the magneto. It reads as an open circuit on a DMM. I measured the rear-engine pickup and it does measure a resistance, though I don't recall the value at the moment. I have not been able to locate any specs on the part, beyond the old and replacement part numbers.
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10-21-20, 01:54 PM
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