If you have a W709 pump kit, fill the sac manually with some water, then try to empty using the pump. If the impeller is toast, it wont drain well either. Next, pull the pump cover off and inspect the impeller. When you last used the boat, did you leave the pumps in the drain position, or did you run them in the fill direction for about 5-10 seconds to flip the impellers? This prolongs the life.
why does it matter is the impellar are in the drain motion vs the fill motion???
A Day at the Lake...Priceless
A Day in Powder...Endless
2012 Möbius XLV~ Loaded & Exiled
2007 Outback V ~ sold