"richard" wrote in message
oups.com...
I may be way off but I thought that outboards and inboards were safer
than I/O becuase they water drains out of them when not in use and
can't you just remove a hose and hook it up differently and make your
system a closed system. Can anyone tell me if I am right or wrong?

Even if you switch over to "closed system" you will still have seawater in
the heat exchanger and in the exhaust system. Anti freeze in the closed
system will work but no way to protect the standing sea water in the
exhaust.

Steve
s/v Good Intentions