Bilge Drains 390 Express

[390Express]

Anyone have an idea as to how the bilge drains are ran, or a good way to unclog them when you can't see them? Considering poking around with a hose near the pump. Cleaned the bilge, and figured it would drain back, or could use the pumps to get rid of the mucky water, but all pumps are dry and in dry areas, but the middle of the boat is full of now cruddy water, that won't drain anywhere... I'm sure it would drain slowly, but I'd like to figure out why they're clogged and not draining. May bring a pump down and pump it out with a 120ac pump.

[km1125]

Not sure on the 390 Express, but on my boat there are places where it will get trapped but once I get on plane (or start to get on plane) and the water runs towards the stern it will find the scupper holes to get to the center compartment where the bilge pumps are.