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#1
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Tachometer Magnetic Pickup Needed
I’m pretty sure the pickup on my front engine is bad. I’ve swapped tach leads to check the gauge and checked the wiring. Any ideas on where to find a replacement, besides Continental? They want about $1k.
Also, any suggestions on how to replace it? Remove the starter to get access? I can barely see it, let alone reach it. 
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#3
10-21-20, 01:20 PM
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What are you symptoms?
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#4
10-21-20, 01:54 PM
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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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#7
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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#8
10-25-20, 11:47 PM
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Did you need an STC for it?
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#9
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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#10
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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#11
10-27-20, 01:22 PM
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337B Philadelphia PA
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#12
10-27-20, 01:51 PM
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Pick-up
Kevin (kbecker),
If Ohio does not take you up on the offer for the tach pick-up, I will. I just troubleshot my rear tach and determined it is the pick-up. I have found a source for a new one, but if I can get a better price on a used one I would prefer that. I have an Insight G4T with electronic tach which is far more accurate, however, it is not legal to replace the old Cessna primary. Jeff
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#13
10-27-20, 11:53 PM
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Ah, that’s what I was looking for. Thanks.
Quote:
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#14
10-29-20, 12:17 PM
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Also, here is the STC showing it can be used as a primary 👍
http://www.aerospacelogic.com/store/...0SA02825NY.pdf
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337B Philadelphia PA
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