2007 SAN 210 Belly tank emptying by itself

[macstac]

I have a 2007 SAN 210 and I took it out on the weekend and I noticed towards the end of the day that the belly tank was only half full. Then 20 minutes later the gauge was saying it was empty.

Does anyone know what the cause of this could be?

[ronskal]

I would have to think a worn impeller in the pump since that is the big wear item. I am not sure if Nautique uses check valves in their ballast system like I had on my MC.

[migs]

try having your pump on fill rotation while you are riding. See if that stops it from emptying during the day.
I notice that after filling my tanks, if I bump empty for a few seconds, then leave it. It will empty a bit by mid day. But if I just stop it after its full, and not bump empty, it does not empty at all.