That should slow the leak.
Catalina 22 leaking. Lowered the swing keel to see if I can find the leak above the keel. Roll either towards or away from you lift the roller off the surface move it back to the start move over a little set the roller back on the deck and roll again in the same direction. It is also important to be able to contact owners to comply with Coast Guard notification requirements.
Theres a piece of plastic trim that wraps around the inside of the opening under the hatch slider. Is the leak from the plexi to frame or is it from the frame to the hull. If you take a close look at your chain plates you will see that the thickness of the fore and aft chain plates is greater than that of the center one so the problem may not be just with the verticle flange part of the cover.
The rollers job is strictly to create texture. There is a cable that extends from the keel winch through a keel cable tube and then through what is called the volcano. I think Catalina made them only as a solution for leaking around the center plates.
Retractable-keel models are also often launched using a hoist and slings. I had water below the cockpit and lazarette area and some in cabin. The Catalina 22 is a very plain-jane vanilla ride.
Its not a good teaching boat not worth spending much money on. With the thought of having water in the boat Greg made a hand bailer out of a milk jug. The volcano is a fiberglass cone that extends through the bottom of the boat to the keel.
Sometimes they both leak. Removed it and installed silicone and the bildge was dry as a boneu000bOf course this is only one of 120000000 possible water entry locations on a Cat 22. If it is the latter your best bet is the complete removal of the port.