Sierra 18-0943-2 Exhaust Elbow Gasket | 2-Pack | MerCruiser Exhaust
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Sierra 18-0943-2 Exhaust Elbow Gasket — 2-Pack | MerCruiser Exhaust
Seal your exhaust elbow properly with the Sierra 18-0943-2 exhaust elbow gasket, sold in a convenient 2-pack. This gasket seals the joint between the exhaust elbow and the exhaust manifold on compatible MerCruiser inboard and sterndrive engines, preventing exhaust gas and water leaks at one of the most heat-stressed sealing points in the engine’s cooling and exhaust system.
Sierra Marine produces these gaskets to OEM specifications for MerCruiser applications, ensuring correct material composition, thickness, and sealing surface dimensions for a reliable, long-lasting seal. Always replace the exhaust elbow gasket any time the elbow is removed — reusing a compressed gasket is a leading cause of exhaust leaks after service.
Key Features
- Part number: 18-0943-2 (Sierra Marine) | SKU: SIE-18-0943-2-9
- Quantity: 2 gaskets per pack
- Seals the exhaust elbow-to-manifold joint on compatible MerCruiser engines
- OEM-quality material and dimensions — direct fit replacement
- Single-use — replace with a new gasket every time the elbow is removed
Best Use Case
Best suited for replacing the exhaust elbow gasket on compatible MerCruiser inboard and sterndrive engines during exhaust elbow removal, riser service, or manifold replacement. The 2-pack is ideal for twin-engine vessels or for keeping a spare on hand. Always inspect the exhaust elbow and manifold mating surfaces for corrosion or warping before reinstalling — a damaged sealing surface will cause leaks even with a new gasket. Confirm engine model and year against the Sierra application guide before ordering.
Parts Desk Insights
Exhaust elbow gaskets are a must-sell any time a customer purchases an exhaust elbow, riser, or manifold — they should never reuse the old gasket. The 2-pack is an easy upsell for twin-engine boats. Always pair with the mounting hardware: cross-sell the Sierra 18-8519 Exhaust Elbow Mounting Kit 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 Exhaust Manifold, and Sierra 18-1976-2 Manifold Elbow. The Sierra 18-0305-1 Exhaust Elbow Gasket is the single-gasket option for single-engine applications.
Related Exhaust System Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.