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  #1  
Unread 09-30-20, 11:49 PM
OhioSkymaster OhioSkymaster is offline
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Tachometer Magnetic Pickup Needed

Iím pretty sure the pickup on my front engine is bad. Iíve 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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  #2  
Unread 10-01-20, 11:09 AM
JAG JAG is offline
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Tach Pickup

OhioSkymaster,

Removal of vacuum pump makes it much easier to access the front Tach pickup.

Regarding sources - check with Don Nieser.

Jeff
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  #3  
Unread 10-21-20, 01:20 PM
frank.oconnor19 frank.oconnor19 is offline
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What are you symptoms?
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  #4  
Unread 10-21-20, 01:54 PM
OhioSkymaster OhioSkymaster is offline
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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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  #5  
Unread 10-24-20, 01:21 PM
kbecker kbecker is offline
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Can you post a picture of this pickup? I might have an extra.

Kevin
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  #6  
Unread 10-24-20, 02:14 PM
kbecker kbecker is offline
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Is this what you are looking for?

Kevin
Attached Images
File Type: jpeg magnet1.jpeg (176.1 KB, 517 views)
File Type: jpeg magnet2.jpeg (186.9 KB, 513 views)
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  #7  
Unread 10-25-20, 10:06 PM
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Jhogan0101 Jhogan0101 is offline
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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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Last edited by Jhogan0101 : 10-25-20 at 11:39 PM.
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  #8  
Unread 10-25-20, 11:47 PM
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Skymaster337B Skymaster337B is offline
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Did you need an STC for it?
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  #9  
Unread 10-25-20, 11:54 PM
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Jhogan0101 Jhogan0101 is offline
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From the product page:

Certification / Compliance
TSO C49b
Canadian STC
FAA STC
Certified as primary replacement
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  #10  
Unread 10-27-20, 12:34 PM
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Skymaster337B Skymaster337B is offline
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I saw that. But what I didnít see is the list of approve aircraft for the STC. So Iím asking if thereís more documentation then what is displayed on the website?
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  #11  
Unread 10-27-20, 01:22 PM
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Jhogan0101 Jhogan0101 is offline
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Its all on their site

http://www.aerospacelogic.com/docs/A...0Issue%202.pdf
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  #12  
Unread 10-27-20, 01:51 PM
JAG JAG is offline
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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  
Unread 10-27-20, 11:53 PM
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Skymaster337B Skymaster337B is offline
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Ah, thatís what I was looking for. Thanks.



Quote:
Originally Posted by Jhogan0101 View Post
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  #14  
Unread 10-29-20, 12:17 PM
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Jhogan0101 Jhogan0101 is offline
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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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