Ran it in the water? Or on a trailer? Cause they usually don't get water
in them unless they are in water. The exhaust water is not usually enough.
A few minutes is not usually enough either. Check for fishing line around
the prop shaft. That is a common problem. Did you see the oil? Sometimes
it takes a couple oil changes to get all the signs of water out as the oil
is thick and does not drain well. If it has a seal problem it will be the
input shaft, the prop shaft, or the shifter seals. Most people just replace
them all as it is diffcult to pin down the culprit. The seals are a pain to
remove as well.

If you do some of your own work you could change the oil again and run it
for a while then check it. When I first got my boat it has some signs of
water in the lower unit. I changed the oil and have never had a problem
since. But I change the lower unit oil regularly. And check it for signs
of water regularly. If the original owner never changed the lower unit oil
they do sometimes eventually get a little water in them.

Is this the same marina that services the boat for the prior owner? Thay
may be able to tell you the maintenance history. Have you had previous good
experiences with them? Marinas can be worse than car repair places.

"SueEZ" wrote in message
oups.com...
I bought a 1994 Sea Ray SC2100 this spring. I had it winterized this
fall and the Marina told me the lower unit oil was milky white,
indicating water was leaked in. They filled the unit with new oil, ran
it for a few minutes and drained it again with the same results. They
then performed a pressure and vacuum test. The pressure test passed,
but the vacuum test failed. It would not hold a vacuum. I have never
had a boat fail either test or have water leak. Before moving forward
with a repair, I'd like to understand what could be the problem and the
estimated cost associated. Can someone offer me some advice?