Sea water strainer Install
Yeah drill four 1/2 diameter holes in the bottom of the hull and use hose washers to seal the hole. NOT! You''re not supposed to attach the damn thing to the hull! The strainer will most likely be a glass or plastic container with a metal mesh basket inside. It should be mounted to a wooden vertical surface in or around the engine room, preferably above the water line with a reinforce hose between the strainer and the seacock.
Big shame on Catalina for not equipping a 36 foot boat without a strainer, I guess you get what you pay for!