600 RMK loosing oil

One of my back up sleds (1999 RMK 600 - 5,800 miles) for family and friends has not been ridden since December 2006. I am taking it out this weekend and noticed the oil reservoir is empty all the way down to the top of the pick up hose, so it appears all the oil drained out the hose rather than a leak in the reservior tank. We fill it before every ride, so it should have been over half full after the last ride. There is a little oil below the reservior tank, but who hasn't spilled a little before? I checked the filter and hose and both appear to be okay. Is it possible after 14 months in storage it leaked out through the pump? Any other thoughts?

That was my thought too, but since the oil level was still to the top of the hose I am not so sure. I am thinking if the grommet was leaking it would have leaked down to that level. I cleaned it up under there and put a little oil in the tank, we will see what happens.