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I have oil leaking from the lower unit drain hole. I dropped the lower unit and the drive shaft has oil covering all the way up to the drive gear at the top of the drive shaft? I removed the water pump and all inside has oil. There is no evidence of water in the lower gear case oil. @ 3" below the top of the drive shaft below the gear teeth there is a wear groove, apparently where the seal rides on the shaft. I have read about a service bulletin pertaining to this, but cannot find it anywhere. Apparently, there is a fix with a sleeve. Does the seal need to be replaced or just install the sleeve? How do I get to the seal to replace it? Can it be done with the mid section removed or does the power head have to come off?
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