Sierra Exhaust Elbow Mounting Kit 18-8507 for OMC Sterndrive/Cobra Exhaust Elbow 18-1909-1

The Sierra 18-8507 Exhaust Elbow Mounting Kit supplies the hardware needed to install or reseal the exhaust elbow on OMC Sterndrive/Cobra I/O cooling systems. It is designed for use with exhaust elbow 18-1909-1 and includes the 18-0943-2 elbow gasket, giving you the correct seal for a proper installation without having to source the gasket separately. This application is used on OMC/Volvo GM small block V8 305-350 cubic inch engines.

Exhaust elbows direct spent exhaust gases and cooling water away from the engine, and the mounting kit ensures the elbow seats correctly against the manifold with a tight, leak-free seal. Using the correct gasket and hardware kit at reinstallation helps prevent exhaust leaks and water intrusion, both of which can cause serious engine damage in a marine cooling system. Sierra manufactures this kit to meet or exceed the performance of the original equipment part it replaces, and it is built for the corrosive, high-heat environment found in marine exhaust systems.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8507
• Product Type: Exhaust Elbow Mounting Kit
• Application: OMC Sterndrive/Cobra I/O Cooling System
• Engine Compatibility: OMC/Volvo GM Small Block V8 305-350 cuin
• Compatible Elbow: 18-1909-1
• Included Gasket: 18-0943-2 Elbow Gasket
• Weight: 0.24 pounds
• UPC: 808282127046

Fitment

• OMC Sterndrive/Cobra I/O cooling systems using exhaust elbow 18-1909-1
• OMC/Volvo GM small block V8 305-350 cubic inch engines

Frequently Asked Questions

What is the Sierra 18-8507 Exhaust Elbow Mounting Kit used for? It provides the hardware and gasket needed to mount the exhaust elbow on OMC Sterndrive/Cobra I/O cooling systems, specifically for use with exhaust elbow 18-1909-1.

Does this kit include the elbow gasket? Yes, the 18-8507 kit includes the 18-0943-2 elbow gasket, so you do not need to purchase the gasket separately for the elbow installation.

Which elbow does the 18-8507 mounting kit fit? This kit is designed for use with exhaust elbow 18-1909-1 on OMC Sterndrive/Cobra applications.

What engines is the 18-8507 mounting kit compatible with? It is used on OMC/Volvo GM small block V8 engines in the 305 to 350 cubic inch displacement range.

How much does the 18-8507 mounting kit weigh? The Sierra 18-8507 Exhaust Elbow Mounting Kit weighs 0.24 pounds.

Is this a genuine Sierra part? Yes, the 18-8507 is manufactured by Sierra and is built to meet or exceed the performance of the original equipment part it replaces.

What is included in the box with part number 18-8507? The kit includes the mounting hardware for the exhaust elbow along with the 18-0943-2 elbow gasket.

Is a separate exhaust manifold gasket needed with this kit? No, the 18-8507 kit is specifically for mounting the exhaust elbow (18-1909-1) and includes the elbow gasket 18-0943-2; it does not include a manifold gasket.

Will the 18-8507 kit fit a Volvo Penta application? This kit applies to OMC/Volvo GM small block V8 305-350 cuin engines in OMC Sterndrive/Cobra I/O cooling systems.

Why is it important to replace the elbow gasket during this installation? A worn or improperly sealed gasket on the exhaust elbow can allow exhaust or water leaks, so the 18-0943-2 gasket included in kit 18-8507 ensures a proper seal when the elbow is mounted.