saildrive water leaks

 I drained my oil today and got about 20 cc of water-not good- I have not taken off the prop yet but I did consult the shop manual-no help-Can I change the seal without taking off the lower section of the sail drive?

Before you dig into the sail drive, check for the possibility that the water may be coming in through the oil drain screw, or the other screws in the side of the sail drive. The fiber washer on the oil drain screw could be compromised. The best way to check this is to get the boat out of the water, drain all the gear oil out of the sail drive, then refill with the thinnest oil you can find. Or use paint thinner! Let it sit overnight and see where the leak comes from. Before putting back into service, drain out the thin oil, or thinner, and refill with the old gear oil. Then I suggest draining that and putting in new gear oil. This will flush out the thinner oil or paint thinner or whatever you use. You may be into a $3.00 fix instead of a $300 dollar fix.