Sierra 18-1974-1 Marine Exhaust Riser Elbow 3" MerCruiser V6 V8

The Sierra 18-1974-1 is a marine exhaust riser elbow designed for MerCruiser sterndrive V-6 and V-8 engine applications. This cast iron riser features a 3-inch outside diameter outlet compatible with standard 3-inch exhaust hose, and a 0-degree down-angle configuration. It is a direct aftermarket replacement for Mercury Marine OEM part number 98502A2, as well as cross-referencing Barr MC-20-98502 and GLM 51192.

Key Features:

• 3" outside diameter exhaust outlet — accepts standard 3-inch exhaust hose
• 0-degree down-angle (straight/no down-angle) riser design
• Riser mating bolt pattern: 3-7/16" (87.3mm) x 3-1/16" (77.8mm) center-to-center
• Fits MerCruiser V-6 and V-8 sterndrive applications
• Includes 18-0897 gasket and brass plugs
• Engineered to meet or exceed OEM standards
• Durable cast iron construction built for harsh marine environments

OEM Cross-Reference: Replaces Mercury Marine 98502A2, Barr MC-20-98502, GLM 51192.

Sierra is a trusted name in marine aftermarket parts, offering premium-quality replacements for thousands of marine engine components. The 18-1974-1 exhaust riser elbow delivers reliable performance and long service life as a direct drop-in replacement for worn or corroded OEM risers.