Sierra's 18-2826-9 Water Pump Base Gasket is designed for use in Mercruiser stern drive and Mercury marine applications. It is interchangeable with GLM 31040, Mallory 9-60036, Mercruiser Stern Drive 27-33146, 27-856704, and Mercury Marine 27-33146, 27-85610, 27-856101. Each Sierra product meets or exceeds the original equipment part it replaces.
