water in clean out port

[RyanF]

Hello, I have a 2021 252S and when I’m out on the water all day, the bilge pump kicks on when I run the boat at higher speeds. When I check the clean-out ports, one port is filled with water to the top while the other stays dry. I’ve tightened both hose clamps that secure the rubber sleeve to the fiberglass, but didn’t notice any change. I’m not sure if that’s where the water is getting in or if there’s something else I should be checking.
Thank you for your help

 

[Hot2Go]

If you think there is a leak follow this thread:

Leak Finder Thread

More than likely your clean out plugs are allowing some water through. They could need the bottom half replaced and/or you could place a #350 o ring in the bottom of the tunnel. It’s discussed widely in this thread:

O-ring Cleanout Plug Thread

 

[FSH 210 Sport]

You need to put a bead of silicone around the interface of the removable clean out tray top and the hull. Do this when the tray is installed, do not glue it down. Then as @Hot2Go showed get some O rings to put down in the clean out plug wells and stop the water from coming in.

Start at post #90.

I

Post in thread 'Another Clean-Out Plug Thread'

May 28, 2025

McMaster 9452k408 - 5 pack of 350 o rings $7.75

• Igetwet

• 

You can get the O rings from @Spooky pantz

S

Boat Stuff Thread 'O-Rings for Clean-Out Plug'

Jul 7, 2025

O-rings to help seal the clean-out plug(s) and prevent water from sliding past the plug. On my boat, I found that my plug was always full of water and may have been overflowing into the inspection tray. Thanks to @TeeNGee, who found that this O-ring could help better seal the plug and prevent water intrusion (Thread). Since installing this O-ring, my plugs are bone dry.

These aren’t super easy to find/buy so I bought them in bulk. I now have a BUNCH to move

$5 each, shipped to CONUS via USPS. You’ll need 1 per plug

• Spooky pantz
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