This covers installation of the EGT probe manufactured by J.P. Instruments. While EGT probes manufactured by others also follow identical procedures, please read their manufacturer instructions for specifics.

If your aircraft previously had an EGT installed, the new EGT by J.P. Instruments will fit into the existing holes in the exhaust stack. This applies to any engine having probe holes of 1/8" to 1/4" diameter. If fitting an EGT probe where none existed previously, you will need to drill a 1/8" diameter hole and ream to fit. Before you begin drilling, mark the spots where you will need to drill. Each probe should have a uniform distance separating them from each other and from the exhaust ... Read more »