Sierra's 18-7981 Fuel Filter is designed for use in Mercruiser stern drive and Mercury marine applications. It is interchangeable with Mallory 9-37970, Mercruiser Stern Drive 35-8M0060041, 35-8M0122423, and Mercury Marine 35-884380T, 35-8M0020349, 35-8M0060041. Each Sierra product meets or exceeds the original equipment part it replaces.