Anybody removed Kohler genset O2 sensor blind?

[Atalla]

Hey folks - I’m slowly troubleshooting. Next on my list is replacing the O2 sensor which is threaded into the rear just ahead of the exhaust. Problem is that my Genset backs up to the interior of the bilge. I can get my hand on the O2 sensor but can’t really gain any leverage to turn it. Anybody figure out a magical way to make it happen? This is on a 7.3e but should be the same as the 5e.

 

[Powell 290]

The make an open ended socket for the O2 sensor the worked pretty easy. Get an Ohm meter and check the sensor to see if its bad 1st.