I got the new O2 sensors and installed them today. I plan to run the boat tomorrow, probably 40 miles or so. That should give me an idea if they made any difference. I had the stbd engine showing the single flash when I shorted the red connector, and the port engine light just stayed on. I checked them both today after running it with the old sensors, and both engine lights stay solid. This was after a reset, then running 60 miles last weekend. I installed the new ones and reset again, so I am starting fresh tomorrow. I will check the lights with the jumper afterwards to see if there is any change or flashes.