ballast pump won't empty...

[liquidlite]

one of my rear pumps runs when filling (and fills perfectly), but does not run/drain when i flip it to empty. any ideas on what this might be? pardon my ignorance folks.

[bbuhtz]

I'm guessing your talking about a reversible pump if your using it for filling and draining. If it is, I would check the wiring and make sure everything is connected correctly.

[kaneboats]

Please post your boat model and year. Different years and models have different systems.

[liquidlite]

2007 Moomba LSV
gravity three ballast

[mnpracing]

on the 07 there's a separate drain pump for each bag. First, check the fuses under the dash. They are labelled pumps and solenoids, you'll be able to see which fuse you need to check.

[kaneboats]

Yup, separate pumps on each bag for fill and for drain. If you are sure you have power to the pump, then you might need a new one. You can get one to replace it at WalMart.