Hi We have been studying the threads here trying to troubleshoot our oven woes. Our '70 landyacht oven looks not to have been used much at all. We can get the pilot to light and will increase in flame size until 350+ degrees. It stays lit for 1-2 minutes and then goes out without ever lighting the large burner. We have tried to manually light the burner as well, no luck. Does this sound like the (mystery)thermacoupler? If so is it the part inside the oven on the side wall which attaches to the burner? And where would we buy a replacement part? We have taken that part out and cleaned it and the spring part seems to let airflow when it pushed manually. Also is it the thermostat that controls the operation of the the thermacoupler, and this is more likely the problem? Thanks!!!