I think mine is 1989 and has a much different reservoir the valves are not in a Y hose but one atop the other at the manifold. Looks like I'll be replacing mine, and may even reposition the switch and valves to the rear compartment. And am seriously thinking of replacing it with a manual pump......less to go wrong, eh. I see no thread on just replacing the pump, a good one on replacing o rings, I'll start a fresh thread.