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Thread: WESTACH CHT/EGT Probes

  1. #1

    Join Date
    Nov 2019
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    Good Day All...
    Sorry in advance. Nubbie question...I have a EXP CUb with a Lycoming O-320 A1B.
    I purchased the 2" Westach Duel CHT EGT Gauge and what I believed was the correct corresponding probes. Not so much so. Seems the EGT I ordered, was for an exhaust manifold with a pre tapped boss to screw the probe into, and the CHT was the one one that fits under the spark plug, vice the bayonet type I wanted.
    I posted a question to the company I purchased the gauge from and they replied that they didn't have an application guide to precisely advise me which parts I should re-order.
    Can anyone advise which Westach CHT and EGT probes i would order for this engine.
    Many Thanks

  2. #2
    wireweinie's Avatar
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    Aug 2013
    Palmer, AK
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    712-7DK for CHT and probably 712-32DWK for EGT.

    Life's tough . . . wear a cup.

  3. #3
    hotrod180's Avatar
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    May 2008
    Port Townsend, WA
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    I installed a UMA replacement CHT gauge a few years ago, and had a hard time determining which (bayonette) probe I wanted.
    Guess I picked right, cuz it worked when I got it installed.
    Cessna Skywagon-- accept no substitute!

  4. #4

    Join Date
    Nov 2019
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    Hi Wireweinie...thanks for the advice...I will order them up this week. Getting closer. Cheers!
    Thanks wireweinie thanked for this post

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