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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
Gasket, 18mm
0.13 + .16 Ohms / - .05 Ohms
86252
K - Red and Yellow
Reverse
0.66 +/- .10 Ohms
86253
Bayonet, Screw-in **
0.65 +/- .10 Ohms
AA86146
*A new installation of P/N 86251 requires P/N 28202 as well.
** Does not require bayonet adapter. Screws directly into the thermowell.
For more information on probes, go to Thermocouple Probes.
ALCOR Instruments and Probes
Don't waste your money on cheap instruments and probes. There is a big difference!
Increase engine life and enhance safety through proper monitoring
Alcor: A name you can trust
Simple installation
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