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eschlanser
Joined: 08 Apr 2010
Posts: 60
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 Posted: Thu Aug 30, 2012 6:16 am Post subject: MA3SPA air temp sensor in a Lyc O320 |
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How is a threaded carburetor air temperature sensor installed in a MA3SPA? If it is in the small port at the bottom rear of the bowl, I have applied a lot of pressure with an allen wrench with no luck. Besides, that would seem to be a spot that is under water, so to speak.
Thanks,
Eric
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eschlanser
Joined: 08 Apr 2010
Posts: 60
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| Posted: Thu Aug 30, 2012 6:38 am Post subject: Re: MA3SPA air temp sensor in a Lyc O320 |
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Someone else might be curious to an answer on this question. A little more searching found a thread on this topic on another forum here:
http://www.vansairforce.com/communit...ad.php?t=25856
Eric
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BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
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| Posted: Fri Aug 31, 2012 12:51 pm Post subject: MA3SPA air temp sensor in a Lyc O320 |
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Eric:
From your description you are looking at the wrong end.
The threaded hole is located at the front of the Carb. It should unscrew pretty easy with the proper size Allen Wrench or sometimes there is a Square headed plug.
Use Anti-Seize when installing since you will have S/S against Aluminum.
Barry
On Thu, Aug 30, 2012 at 10:16 AM, eschlanser <eschlanser(at)yahoo.com (eschlanser(at)yahoo.com)> wrote:
[quote]--> LycomingEngines-List message posted by: "eschlanser" <eschlanser(at)yahoo.com (eschlanser(at)yahoo.com)>
How is a threaded carburetor air temperature sensor installed in a MA3SPA? If it is in the small port at the bottom rear of the bowl, I have applied a lot of pressure with an allen wrench with no luck. Besides, that would seem to be a spot that is under water, so to speak.
Thanks,
Eric
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=382132#382132
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eschlanser
Joined: 08 Apr 2010
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eschlanser
Joined: 08 Apr 2010
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| Posted: Sun Sep 02, 2012 4:26 am Post subject: Re: MA3SPA air temp sensor in a Lyc O320 |
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Barry,
Thanks for the reply. Although you are correct, my carb is not tapped at that location. Instead, there is a lead plug.
I called Marvel and got the story. The lead plug must be punched out with a 1/8 in. punch and the lead residue picked out. THen, the hole is drilled with a #3 drill and tapped with a 1/4-24 NF tap. In mine, the mounting flange must also be relieved to make room for the top of the nut on the probe as the hole is too close.
Eric
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