The twin Yanmar diesels require sea water to circulate through a heat exchanger and before the ocean water runs through the small belt driven pump, it needs to be strained. These neat strainers should do the trick. They are mounted a little over 6 inches above the water line.
Bulkhead mounted with two stainless thru bolts.
new in the box.
Port side installation. This picture was taken while sitting in the engine compartment along side the engine. ( underneath the port side aft bunk )
Bulkhead mounted with two stainless thru bolts.