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McFarlane Aviation Family
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CHT Thermocouple Probes
7 products
1
PART NUMBER
DESCRIPTION
PRICE
HARDWARE KIT
$11.90
Retail Price: $14.88
Not Eligible for Free Shipping
Expected ship date is 01-27-2026.
CHT PROBE GASKET STYLE TYPE J
$175.91
Retail Price: $219.89
CHT PROBE BAYONET STYLE TYPE J
$129.22
Retail Price: $161.52
CHT PROBE BAYONET STYLE TYPE K
$126.76
Retail Price: $158.45
CHT GASKET, Type K, 18mm
$174.00
Retail Price: $217.50
CHT GASKET, Type K, 14mm
$121.85
Retail Price: $152.31
Expected ship date is 01-27-2026.
1
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 |
|
CHT Probe |
J - Black and Yellow |
Gasket, 18mm |
Grounded |
Normal |
0.13 + .16 Ohms / - .05 Ohms |
|
|
CHT Probe |
K - Red and Yellow |
Bayonet |
Grounded |
Reverse |
0.66 +/- .10 Ohms |
|
|
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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