Sierra Marine 181908 Manifold Riser Spacer

Use With Exhaust Manifold And Exhaust Manifold Risers; 3 Inch; Fits Mercruiser Stern Drive Engines

The Sierra Marine 181908 Manifold Riser Spacer is a replacement component designed for marine engine exhaust manifold and riser assemblies. It helps provide the proper spacing between compatible exhaust components, supporting correct assembly alignment and reliable installation. This part is suited for maintenance, repair, and restoration applications where an original spacer requires replacement.
Use the Sierra Marine 181908 as part of a properly matched exhaust system and verify compatibility with the engine, manifold, riser, and related mounting hardware before installation. Correct component matching is important for maintaining the intended fit and function of the exhaust assembly. Always compare the original part, application information, and manufacturer service guidance before beginning work.
This manifold riser spacer is suitable for professional marine technicians, boat builders, and do-it-yourself owners performing service on compatible marine propulsion systems. Its focused replacement design can help simplify repairs by providing the component needed to restore the intended relationship between connected exhaust parts. For best results, inspect surrounding components for corrosion, wear, damage, or sealing issues during installation, and replace related hardware or gaskets when required by the service procedure.
Choose the Sierra Marine 181908 when you need a dependable replacement manifold riser spacer identified by a recognized marine parts brand. Proper installation should be completed by following the engine or boat manufacturer’s procedures and using appropriate marine-grade practices. Confirm application details before ordering to ensure this part is the correct match for your specific system.

Features:

• Brand: Sierra Marine

• Part number: 181908

• Product type: Manifold riser spacer

• Application: Replacement component for compatible marine exhaust manifold and riser assemblies

• Use: Supports proper spacing and alignment during exhaust system assembly

• Installation: Verify compatibility and follow the applicable manufacturer service procedures