Sierra 18-1937 Marine Exhaust Manifold Elbow Replaces MerCruiser 98562A6

The Sierra 18-1937 is a cast iron exhaust manifold elbow (riser) designed as a direct replacement for MerCruiser 4-cylinder 3.7L inboard engines. It replaces the original MerCruiser OEM part number 98562A6 and is fully interchangeable with the factory component it is designed to replace.

Important: This cast iron exhaust riser is designed exclusively for use with aluminum exhaust manifolds. MerCruiser 4-cylinder engines were produced with both aluminum and cast iron manifolds — verify your manifold material before ordering. This elbow will not properly mate with a cast iron manifold.

Key Features:

• Cast iron construction, primed and painted for corrosion protection and added durability
• Elbow mounting bolt pattern: 3-1/8 in. x 3-1/2 in.
• Direct OEM replacement — ready to install out of the box
• Replaces MerCruiser OEM part number: 98562A6
• Cross-references: Osco 8561, Sierra 51180, 9-40551

Compatible Accessories (sold separately):

• Exhaust Elbow Mounting Gasket: Sierra 18-0881-1
• Exhaust Elbow Mounting Kit: Sierra 18-8530

Sierra International is a trusted leader in aftermarket marine engine parts, offering comprehensive coverage across all major engine brands with an unsurpassed customer satisfaction warranty covering parts and labor.