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CHT Thermocouple Probes

CHT Thermocouple Probes  
Includes fire sleeve and ring terminal hardware. Two different mount styles are available:

Bayonet Mount
These twist and lock into a screw-in adapter. The probe is spring loaded to ensure contact with metal instead of air. Choose bayonet style if the engine model is equipped with threaded thermowell receptor and/or bayonet adapter in the cylinders.

Gasket Mount
These do not require a screw-in adapter. The 18mm gasket fits on many common spark plugs. Some engine designs, such as radial engines, the O-235 and O-200, may prevent the use of bayonet style or may not allow for the use of a bayonet adapter. Choose gasket style if the engine model is NOT equipped with threaded thermowell receptor and/or bayonet adapter in the cylinders. 

P/N 

Description 

Thermocouple Type 

Mount 

Grounded or Ungrounded 

Stagger 

Resistance 

86251**

CHT Probe 

J - Black and Yellow 

Bayonet 

Grounded 

Normal 

0.24 +/- .05 Ohms 

86202 

CHT Probe 

J - Black and Yellow 

Gasket, 18mm 

Grounded 

Normal 

0.13 + .16 Ohms / - .05 Ohms 

86252 

CHT Probe 

K - Red and Yellow 

Bayonet 

Grounded 

Reverse 

0.66 +/- .10 Ohms 

AA86146

CHT Probe

 

Bayonet

Grounded   0.57 +/- 

* Does not require bayonet adapter. Screws directly into the thermowell.

** A new installation of P/N 86251 requires P/N 28202 as well.

For more information on probes, go to Thermocouple Probes.

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