Sierra’s 18-3714 Brass Castle Washer fits Mercury/Mariner 135-275 (V6, 2-cycle) and Alpha, Bravo I (without Flo-Torq II Hub). It is interchangeable GLM 21360, Mallory 9-73902, Mercruiser Stern Drive 12-31211, 12-31211A2, 12-31211A3, 12-31211Q03, and Mercury Marine 12-31211, 12-31211A2, 12-31211Q03. Each Sierra product meets or exceeds the original equipment part it replaces.
Fits Mercury/Mariner 135-275 (V6, 2-cycle) and Alpha, Bravo I (without Flo-Torq II Hub)
Interchangeable GLM 21360, Mallory 9-73902, Mercruiser Stern Drive 12-31211, 12-31211A2, 12-31211A3, 12-31211Q03, and Mercury Marine 12-31211, 12-31211A2, 12-31211Q03
Material: Brass
Each Sierra product meets or exceeds the original equipment part it replaces
