Exhaust Manifold Riser Gasket SIERRA 18-2833-9

Compatible Engines

The SIERRA 18-2833-9 exhaust manifold riser gasket is a critical component of your engine's exhaust system, engineered for reliability and longevity. This part is specifically designed for MERCURY MARINE and MCM engines, including 120 HP models (from 1993), 140/3.0L, 470 HP, 165 HP with 6-cylinder engines, and GM V-8 small block engines (up to 1982). NOTE: Due to various engine configurations, we recommend verifying compatibility using catalog number 18-2833-9 or the original OE number. If unsure, contact our support team for assistance.

Installation and Operation

• SIERRA Original Quality – guarantees leak-proof performance and corrosion resistance.
• Perfect Fit – prevents water and exhaust leaks, protecting the boat interior.
• Easy Replacement – standard sizing allows for simple servicing without specialized tools.
• Long Service Life – heat-resistant material withstands seawater and high temperatures.

During installation, ensure mating surfaces are clean and free of old gasket material. Regular replacement of this part prevents serious failures and extends engine life.