Compact under cowl fuel filters for smaller outboards Removing fuel contaminates will protect sensitive engine parts and keep your outboard running in top shape. Sierra's inline fuel filter elements deliver effective filtration while maintaining fuel flow. These compact inline filters are designed as the last filtration point in the fuel line and can be easily installed under the cowl of outboard engines. Key Features Inline design allows filter to be installed easily along fuel hose Compact design for under cowl installations Compatible with 1/4" fuel lines The Sierra Engine Parts Selector In addition to inline fuel filters, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see ourEngine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.