Sierra 18-7784 Fuel Filter for Mercruiser Stern Drives Sierra 18-7784 is a replacement fuel filter for Mercruiser Stern Drives and has a Micron Rating of 20. All Sierra aftermarket fuel filters are manufactured to meet or exceed OEM requirements. Fits Mercruiser 2.5L3.0LSerial No. 6229718 later All MC224 CID Serial No. 6218037 later All GM 262 CID Serial No. A331455 later with Carter Fuel Pumps Interchangeable with Mallory 9-37821 Mercruiser Stern Drive 35-11004 35-11004A1 35-11004Q2 35-11004