My 97 SP keeps getting lots of oil in the hull, (bout 1 gall) but I cannot find where it is leaking from? Checked for leaks around the tank but don't see any. There is a clear (now brownish) piece of tubing that connects to a 1-way valve on the right side of the hull but I don't know where it connects to? There is a one-way valve on top of the oil tank with no hose connected to it, is this where the clear hose is supposed to go? Seems odd that there would be 2 1-way valves in-line with each other. Anyone else w/ oil probs like this?