Quicksilver 16248 In-line Fuel Filter - Mercury and Mariner 2-Cycle and 4-Stroke Outboards Under the cowl fuel filter for Mercury and Mariner outboards Protects your 2-cycle or 4-stroke outboard from damaging contaminants Produced to Meet Mercury marine original equipment Manufacturer specifications to best protect your engine Easy to replace in-line to fuel line with existing hose clamps and common tools Translucent plastic allows you to check for fuel content and debris