Eis 4000

[cap01]

dan , i did check my engine last nite and i did use the ring thermocouples . i didnt install it under a spark plug but rather under a bolt in the cylinder head where the rotax temp probs was installed . for the water temp , i have a piece of pipe with a boss with the rotax temp probe installed . i think ive seen the same thing for sale in a lockwood catalog . and you are correct , the rotax probe does require a ground .

[DesertFox4]

Dan, I used the thermocouples like Cap01. I should have taken my camera the other day and sent you a photo to go with my explanation. Maybe the EIS kits have changed since I installed mine. Mine are also not on the spark plugs but on the cylinder heads. They are black in color with a ring end. Might have been a choice available at purchase time from GRT per recommendation from others.

[DanB]

Chuck, using those rings under the Rotax Temp probes sounds inviting to try. The down-side to the rings on the plugs just seem to be a little more tedious when time to check or change plugs. Thanks for the info!

[Esser]

Old post being brought to life. For the CHT temperature “probes” can I just put the two thermocouple wires together in a standard ring terminal and bolt to the head? I think this is fine I just wanted another opinion.