i also relocated my cht coupler i had it under the plug and like Steve said it gave a higher reading like 75 deg also i burned a valve seat due to plug coming lose possibly all other valves were fine. proper location is on the right bank looking out of the aircraft #2 or #4 cly depending on mag or dist firing orders are different under head bolt (stud) and not the plug.
mac mcfarland flymaca711...@aol.com
