Home » Categories » Multiple Categories

CHT Bayonet Probes (A200-TCB) in Franklin Engine

A200-TCB Installation Instructions. I have read these instructions but they don't say how far to insert the thermocouple probes into the cylinder head thermocouple wells. Should they be inserted until they touch the bottom of the well or should the tip not touch the bottom of the well?

How tight do you tighten the nut on the thermocouple well fitting?

I am installing this kit on a Franklin 350 cu. in. engine which has 1/8 NPT threads in the cylinder head. Not sure but the supplied fitting may need to be replaced.

The probes and supplied fittings are so designed that they will seat correctly when installed. The tip must not contact the thermowell and (again) the design ensures that. Unless the bend of the probe is altered (allowable) the probe will settle approximately 1/4" above the rim of the compression fitting.

It is standard practice to finger tighten the compression lock nut and then 1/2 turn with an appropriate wrench.

The Lycoming, Continental and Franklin thermowells are 3/8-24 UNF thread.
Attachments Attachments
There are no attachments for this article.
Comments Comments
There are no comments for this article. Be the first to post a comment.
Related Articles RSS Feed
Operation with Disconnected Probes
Viewed 1514 times since Tue, Dec 14, 2010
Single Cylinder use of ET20x and CT20x Instruments
Viewed 1683 times since Wed, Dec 22, 2010
CHT Ring vs Bayonet Probes
Viewed 11425 times since Thu, Dec 16, 2010
Instrument and Probe Grounding
Viewed 1443 times since Tue, Dec 14, 2010
Installing A200-TCB Bayonet CHT Probes
Viewed 2728 times since Tue, Dec 14, 2010
Correct CHT Limit Setting Determination
Viewed 6698 times since Fri, Dec 24, 2010
Physical Location of Probe Connectors
Viewed 2257 times since Tue, Dec 14, 2010