"Roger Long" wrote in message
...

According to two boatyards I've talked to, it's far more common than you
would think. They say the only foam and glass rudders that don't have
some water in them are the ones where no holes have been drilled to check.

Two out of four of my rudders (one each on two cats)had water inside, before
any holes were drilled. As easy as it is to plug a hole in fiberglass, I'm
skeptical about what your boatyards say.

Two haulings ago I drilled two holes(different heights) fore and aft through
both walls of the rudder post (ss pipe) of each rudder. Now I don't have to
re-drill the rudder to drain any water. I just stick a long tube down the
post and use my oil change pump to extract any water. This can be done while
afloat, as well.