Sea Ray

I had that issue once. Apparently it's with the duck bill getting clogged. You most likely sucked up some sand or mud. Not a big deal. My mechanic told me that if you want to use your boat before it's fixed, put a quarter in between the male and female freshwater attachment. That will stop it while not hurting the engine. I fixed mine by lifting it out of the water, on a boat lift, hooking up the fresh water flush, starting the engine and then letting it run for 30 seconds. Then I lowered it into the water while flushing and starting it again - now it's got the flush and the draw from the water - it unclogged and hasn't clogged since. These duck bills are under warranty though. Good luck!