Sierra 18-1978 Exhaust Manifold Elbow

• Mercruiser 3 inch Exhaust Elbow
• Fits Mercruiser V8 inboard engines
• Replaces Mercruiser 76771
• Replaces Osco 6771

Replaces: Mercruiser Inboard/Outboard #76771A3 V-8 inboard applications only Use with 18-1950; 18-1951; 18-1958 & 18-1962 Manifolds and 18-2833 Elbow Gasket. NOTE:Replaces OEM part # MERCURY MARINE 76771A2 MERCURY MARINE 76771A3 For: V-8 Inboard Applications Only Use with: Manifold: 18-1950-1; 18-1951-1; 18-1958; 18-1962; 18-1954-1; 18-1955-1; 18-1956-1 Elbow Gasket: 18-2833 Mounting Kit: 18-4362