Exhaust Elbow Riser Gasket – Fits Volvo Penta V6 & V8 (Replaces 835908, 856039, 857618)
Exhaust Elbow Riser Gasket – Fits Volvo Penta V6 & V8 (Replaces 835908, 856039, 857618) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Elbow Riser Gasket – Fits Volvo Penta V6 & V8 (Replaces...
Product Details
This Exhaust Elbow Riser Gasket is designed for Volvo Penta V6 4.3L and V8 5.0L, 5.7L, and 8.1L marine gasoline engines manufactured between 1979 and 1993. It specifically fits models with center-rise exhaust manifolds and pre-SX drives.
This part serves as a direct replacement for Volvo Penta 835908, 856039, and 857618; Sierra 18-2971 and 18-2971-1; Barr Marine VO47-835908; GLM 35080; Osco 35908 and 56879-G; and Mallory Marine 9-65800.
- Installs between the exhaust manifold and the exhaust riser.
- Designed for bolt-on, flat gasket type connections.
- Specifically for center riser configurations and non-SX drive applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 835908 / 835908-5 |
| Volvo Penta | 856039 / 856039-3 |
| Volvo Penta | 857618 |
| Sierra | 18-2971 / 18-2971-1 |
| Barr Marine | VO47-835908 |
| GLM | 35080 |
| Osco | 35908 / 56879-G |
| Mallory Marine | 9-65800 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta engines, this gasket fits V6 and V8 models with center-rise exhaust manifolds, generally from 1979 up to 1993 (pre-SX drives).
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ200 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | AQ225 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | AQ260 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | AQ271 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | AQ290 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | AQ311 | V8 | 4-Stroke | 1979–1993 | 835908, 856039, 857618 | For center-rise manifold |
| Volvo Penta | 4.3L V6 | 4.3L | 4-Stroke | Up to 1992 | 835908, 856039, 857618 | Non-SX drives only |
| Volvo Penta | 5.0L V8 | 5.0L | 4-Stroke | Up to 1992 | 835908, 856039, 857618 | Non-SX drives only |
| Volvo Penta | 5.7L V8 | 5.7L | 4-Stroke | Up to 1992 | 835908, 856039, 857618 | Non-SX drives only |
| Volvo Penta | 8.1L V8 | 8.1L | 4-Stroke | Up to 1992 | 835908, 856039, 857618 | Non-SX drives only |
Technical Specs
- Product Type
- Exhaust Elbow Riser Gasket
- Installation
- Between exhaust manifold and exhaust riser
- Fuel Type
- Gasoline
- Connection
- Bolt-on
- Housing Material
- Composite/Metal
- Housing Color
- Black/Gray
- Dimensions
- 3.75" (95mm) outlet diameter
- Fitting Type
- Flat gasket
- Warranty
- Varies by manufacturer (typically 1 year)
- Other Technical Attributes
- For center riser configuration, non-SX drive applications
What’s in the Box
- 2 x Exhaust Elbow Riser Gasket (835908/856039/857618)
Installation Notes
- Disconnect the battery and allow the engine to cool completely.
- Drain the engine coolant to a level below the exhaust manifolds.
- Disconnect any hoses connected to the exhaust riser.
- Carefully unbolt and remove the old exhaust riser and gasket.
- Thoroughly clean both the manifold and riser mating surfaces. Ensure they are free of old gasket material, rust, and debris.
- Position the new gasket on the manifold, aligning the bolt holes.
- Place the exhaust riser onto the new gasket and securely tighten the bolts to the manufacturer-specified torque.
- Reconnect all hoses.
- Refill the cooling system.
- Start the engine and carefully check for any exhaust or water leaks around the gasket.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific engine model?
First, check the Engine & Model Compatibility table on this page. Second, verify your engine has a center-rise exhaust manifold and is a pre-SX drive model (typically 1993 and older). Finally, compare the part numbers listed in our Part Number Matrix to your existing part or service manual. When in doubt, consult a professional marine mechanic.
What are the signs of a failing exhaust riser gasket?
Common symptoms include water leaking externally from the joint between the manifold and riser, water in the engine oil (milky oil), steam from the exhaust, or engine overheating. A damaged gasket can allow water to enter the engine cylinders, causing catastrophic failure, so it should be addressed immediately.
How often should this gasket be replaced?
Replacement interval depends on usage (freshwater vs. saltwater) and operating conditions. As a general guideline, exhaust gaskets should be inspected annually and replaced whenever the exhaust riser or manifold is removed, or every 3-5 years in saltwater environments as part of preventative maintenance.
Is this for a single side or both sides of the engine?
This package includes two gaskets, allowing for replacement on both V-engine banks (port and starboard sides).
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility and batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
