Mercury - Poppet valve assy - 8M0114707Keeping an outboard running at the right temperature isnt just about pushing water through the system its about managing flow when conditions shift. Thats exactly what the Mercury Marine Poppet Valve Assembly 8M0114707 is built to handle. This small but essential part regulates water flow through your cooling system, opening up when your RPMs climb and dialing things back at lower speeds, ensuring your engine runs right where it should not too hot,