Mercury - Water Inlet Screen V12 Cooling System Composite Marine Finish 8M0207396. Overview. When you run a V12 outboard, you're trusting a level of power most boaters only dream about. Every push of the throttle, every long run offshore, every moment when the seas get a little unpredictable - you depend on a cooling system that never hesitates. That's why the water inlet screen matters more than most folks realize. With Mercury Marine part 8M0207396, you get that quiet confidence that comes fro