Mercury - Fuel Filter Kit Gen III Cool Fuel Module Composite & Stainless Steel 892687A02. Overview. Any boater who has spent long hours on the water knows how quickly fuel quality can shift. One bad load or one splash of moisture is all it takes to turn a smooth-running engine into a long day of troubleshooting. That is why the right fuel filter feels like quiet security. It does its job without making a scene, and you notice it most in the moments when everything runs clean and steady. This Mer