Tried to check the O2 sensor output using a flame from a propane torch.  Nothing.  I’ll probably try again to get a voltage reading at the sensor when I can run again.  It still gives close to full scale reading no matter what mixture setting.

Al,

It takes a while for the O2 sensor to put out a reliable reading.  I don’t get a stable reading on mine until about 1-1/2 to 2 minutes.  You will probably get some sort of reading after a few seconds, but I wouldn’t put much faith in its’ accuracy.  Mine shows a very, very lean mixture while warming up.

Regards,

Steve