O2 sensor maint.

[snooksniper]

I have a 99 200hp txrx fuel injected ox 66. I keep up with all the maintenance on my motor but i do not know anything about how to check the o2 sensor how to clean it, or when to clean it. Can someone please give me a rundown regarding this part.
Thanks

 

[rodbolt]

Re: O2 sensor maint.

do a forum search on O2 sensors.
if ya come up with nothing repost and ill sit and type it again. tired tonight.
its easy, need a test harness but that can be gotten around and you need a digital voltmeter.