I just purchased a jet boat and have a question about a hose coming
from the oil sending unit. The engine is a 455 olds converted by
Berkeley for use on their jet drive. Anyways, there is a "t" coming
off the block at the oil sending unit. On one end is the oil sending
unit. Coming off this "t" is a short 1' hose. On the end of the hose is
a fitting that has a short coupling that looks like you would fit a
piece of hose over. If I take off this coupling fitting what is left
at this end of the hose is a spring with a check ball in it.

I'm going to assume that this hose may be used for draining the engine
oil. I checked under the boat and I don't see any eazy-drain coming
from the oil pan (in fact I can't even find the drain plug on the pan
so if anyone knows what side the plug is on...)

Anyone have any idea how this hose would be used? I'm guessing that
when the engine is started the oil would flow into this tube and force
the ball to seal the end preventing the oil from squirting out, but how
would you use this to change the oil?

Thanks