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O2 Sensors on both engines at the same time

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Blacktimes

Regular Contributor
Well, ran the engines 2 weeks ago and now got an alarm on both engines after starting. Hooked up Dr. H and fault is O2 Sensor on both engines!!! Boat has not navigated since last engine run two weeks ago, also without leaving harbor. We have had very very heavy rains here. Both engines are always left tilted up. Could very very heavy rains combined with very high winds cause this with the engines titled up? Engines are 2011 BF200AK2's serials 170... Somewhat unsettled here with this dual event... Thanks.
 
That's a new one on me, but I guess it's possible. But before replacing those very expensive HO2 sensors, I would check my fuel pressure and pull the plugs to make sure you are getting a clean burn on each cylinder. Maybe Dr. H provides that - I don't know. Is it possible that Dr. H cannot distinguish between a misfiring plug and a bad HO2 sensor?
 
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