I've been researching how to replace an old AC Spark Plug CHT probe in our
Aztec. AC doesn't make them anymore and the replacement Rochester brand
probe operates at a different resistance range requiring the gauge to be
removed, shipped out and recalibrated. Not a fun proposition.

Rumor, and a couple parts houses, have told me that the American Bonanza
Society published an article about this problem and a solution is to install
an 82ohm resistor inline with the probe to account for the difference
between the AC and the Rochester gauges. Sounds easy enough.

Is there a group member that belongs to the ABS that could verify the
article and possibly post or email me a copy??

Any other thoughts or comments about this??

Thanks again, again!!

Jim