1987 Sea Ray 270DA Head problem

[venture326]

Question: My sea ray has a manual flush head with holding tank option. What do I need to do to pump out the head. I used a dock side pump out, thought I had it all out. But light still shows full. When I try to pump out the bowl, the plunger has resistance to a point, then all of a sudden, there's a whoosh and the bowl clears a little bit. Is the tank still full? How will I know if it's completely empty. Any info would be helpful. Thanks.

 

[rbh]

Ours has the porta potty, bottom half holds the yuck.
You can separate the two halfs and dump the lower end or hand pump it out or get it sucked out.
You do have the knob that lets you do the last two items?

 

[tpenfield]

The indicator light could be wrong. You should be able to get a visual on the tank itself to see if it is full, empty of whatever. When you use the pump-out, are you getting a fair amount of flow or just air?

 

[lakegeorge]

I think if you hold a flashlight against tank you should be able to see what's going on.