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#1
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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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#4
10-25-20, 10:06 PM
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I had the same problem. Took mine out and replaced with the aerospace logic digital gauge. Its awesome. Would do it again in a heartbeat.
http://www.aerospacelogic.com/index....product_id=238 https://youtu.be/ot-GQDERFvw
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337B Philadelphia PA Last edited by Jhogan0101 : 10-25-20 at 11:39 PM.
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#5
10-25-20, 11:47 PM
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Did you need an STC for it?
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#6
10-25-20, 11:54 PM
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From the product page:
Certification / Compliance TSO C49b Canadian STC FAA STC Certified as primary replacement
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337B Philadelphia PA
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#7
10-27-20, 12:34 PM
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I saw that. But what I didn’t see is the list of approve aircraft for the STC. So I’m asking if there’s more documentation then what is displayed on the website?
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