Help with EGT Probe and a Suggestion on Fire Extinguisher

[patrolpilot]

Originally Posted by Ernie Martin

For PatrolPilot: the key question is whether the Aircraft Spruce type K probe works with the ORIGINAL factory gauge? let us know when you find out.

Okay, Ernie, the short answer is yes it works.

In order to understand why it will work, I asked my mechanic at Center Line Aero (PKV) and very quickly got squared away on EGT probes. This is specifically Alcor style (Cessna, Alcor, Alcor-Tempest and generic) E & K probes. Almost all other EGT manufacturers use proprietary leads.

Alcor, one lead is shorter than the other, and leads are color-coded on the PMA FAA products.

• The short probe lead matches the long lead on the aircraft.
• The long probe lead matches the short lead on the aircraft.

Color, the PMA-FAA probes and leads match color as well.

• Type E - Black and Red
• Type K - Yellow and Red

Generic leads, know your "Type" and match leads short to long.

Okay, what types? I pulled out the parts manual when I got home, see the attached images. I hope this helps. I think I get probes now!

I wanted to point out that my image shows threaded PMA probes vs. the clamped probes. That is simply the first image that came up. Coding is exactly the same no matter how they are attached to the pipe.