Sierra Water/Fuel Separating Filter 18-79969This Sierra fuel filter separates water and other foreign debris from fuel. It has a rugged construction to be able to handle the harsh marine environment. It contains a 10 micron filter element with a high pleat count. Application: New 175-300HP V6 (3.4L) And V8 (4.6L); Interchangeable with: Mercury Marine; 8M0126144;