Sierra 18-8519 Exhaust Elbow Mounting Kit MerCruiser Inboard Exhaust

Secure your exhaust elbow properly with the Sierra 18-8519 mounting kit an OEM-quality replacement hardware set for MerCruiser inboard and sterndrive exhaust systems. This kit contains the fasteners, washers, and hardware required to correctly mount the exhaust elbow to the exhaust manifold, ensuring a leak-free, vibration-resistant connection that holds up to the heat and movement of a running marine engine.

Sierra Marine is a leading manufacturer of aftermarket marine engine parts, producing components to OEM specifications for MerCruiser, Volvo Penta, Yamaha, and other major marine engine brands. The 18-8519 kit is a direct-fit replacement for compatible MerCruiser applications.

Key Features

Part number: 18-8519 (Sierra Marine)
Complete mounting hardware kit for exhaust elbow installation
OEM-quality specification direct fit for compatible MerCruiser engines
Includes fasteners and hardware for a secure, leak-free elbow mount
Resists heat and vibration in marine exhaust applications

Best Use Case

Best suited for replacing worn, corroded, or missing exhaust elbow mounting hardware on compatible MerCruiser inboard and sterndrive engines. Always replace the mounting hardware when removing and reinstalling an exhaust elbow reusing old fasteners risks stripped threads, uneven clamping, and exhaust leaks. Inspect the exhaust elbow gasket at the same time and replace if there is any sign of deterioration or carbon tracking. Confirm engine model and year against the Sierra application guide before ordering.

Parts Desk Insights

Exhaust elbow mounting kits are a natural companion sale any time a customer is purchasing an exhaust elbow, riser, or manifold. Always ask whether they have the gaskets cross-sell the Sierra 18-0305-1 Exhaust Elbow Gasket and the Sierra 18-0943-2 Exhaust Elbow Gasket (2-pack) for a complete service. For customers replacing the full exhaust assembly, see the Sierra 18-1908K Riser Kit, Sierra 18-1927 Riser, Sierra 18-1953-2 Manifold, and Sierra 18-1976-2 Manifold Elbow. For PCM exhaust applications, see the PCM Exhaust Elbow.