Pete, funny you mention the Mercs with out the sensor, merc determined the coupler with the magnet was the cause of the oil gear failuer, it would swell up and stick in the bore, causeing the gear to strip out. We had a run of sport jets do it, figured they stay setting up longer than the outboards(fisherman). When we inspected the coupler, you couldn't really tell what happened. Most of them were under warranty so we went with what merc said, they updated the coupler, eventually discarded it. If merc had used a bronze gear on the crank, they would have an oil injection on par with Yamaha
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