Clean AC strainers on CAT 53- PORT SIDE

close sea water valve

remove screws and remove the basket strainer lid

remove basket, clean it , making sure every hole in it is clear from dirt and debris

clean the lid making sure you can see through it.

re set the lid and tighten the screws

fill the basket with fresh water

open the sea water valve

Turn on the A/C and verify normal seawater flow.