Fuel filter/water separator element for OMC Changing fuel filters at regular intervals ensures that the engine will run efficiently and at top performance levels. This Mercury Marine filter removes water and particulate contamination from fuel and was designed to work with OMC filter heads. We recommend having a spare to address unexpected clogs. Key Features Removes water and debris that can damage injectors and sensitive engine pars Compatible with ethanol blended fuels (E10) For use with OMC filter heads Applications For use with: OMC engines that use OMC part no. 502905.