Exhaust Manifold-to-Riser Gasket 2-Pack for Volvo Penta AQ200, AQ225, AQ260, AQ271, AQ290 & AQ311 (Replaces 835908, 856039)
Exhaust Manifold-to-Riser Gasket 2-Pack for Volvo Penta AQ200, AQ225, AQ260, AQ271, AQ290 & AQ311 (Replaces 835908, 856039) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Exhaust Manifold-to-Riser Gasket 2-Pack for Volvo Penta AQ200, AQ22...
Exhaust Manifold-to-Riser Gasket 2-Pack for Volvo Penta AQ200, AQ225, AQ260, AQ271, AQ290 & AQ311 (Replaces 835908, 856039) is backordered and will ship as soon as it is back in stock.
Product Details
This exhaust manifold-to-riser gasket 2-pack is designed for selected Volvo Penta marine gasoline engines using the listed AQ-series applications. The gasket installs at the exhaust manifold and riser mating surface and is intended for flat, bolt-on exhaust connections.
The documented replacement references are Volvo Penta 835908 and 856039. The package contains two gaskets, suitable for replacing the gaskets on both sides of a V-engine when the application and existing gasket design match.
- Installs between the exhaust manifold and exhaust riser.
- Flat gasket design for a bolt-on exhaust connection.
- Two gaskets supplied per package.
- Confirm the manifold pattern, riser configuration, and reference number before ordering.
Part Number Matrix
Use the following documented references to compare the replacement gasket with your existing part or service information.
| Brand | Part Number | Reference |
|---|---|---|
| Volvo Penta | 835908 | Replacement reference |
| Volvo Penta | 856039 | Replacement reference |
| Sierra | 18-2971-1 | Exhaust manifold gasket; package of 2 |
Engine & Model Compatibility
The available catalog relationship identifies this gasket for the following Volvo Penta AQ-series models. Model listings alone do not replace checking the exact manifold and riser connection on the engine.
| Brand | Model | Engine Configuration | Applicable Reference | Notes |
|---|---|---|---|---|
| Volvo Penta | AQ200 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
| Volvo Penta | AQ225 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
| Volvo Penta | AQ260 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
| Volvo Penta | AQ271 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
| Volvo Penta | AQ290 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
| Volvo Penta | AQ311 | V8 | 835908, 856039 | Verify the exhaust manifold and riser pattern |
Technical Specs
- Product Type
- Exhaust manifold-to-riser gasket
- Package Quantity
- 2 gaskets
- Installation Location
- Between the exhaust manifold and exhaust riser
- Engine Type
- Marine gasoline engines
- Connection Style
- Flat, bolt-on gasket connection
- Documented Replacement References
- Volvo Penta 835908 and 856039
What’s in the Box
- 2 x Exhaust manifold-to-riser gasket
Installation Notes
- Disconnect the battery and allow the engine to cool completely.
- Follow the engine manufacturer's service procedure for draining or controlling coolant before removing exhaust components.
- Disconnect hoses and other connections attached to the exhaust riser.
- Carefully remove the riser and the old gasket.
- Clean both mating surfaces thoroughly. Remove old gasket material, rust, and debris without damaging the sealing surfaces.
- Position the new gasket over the manifold bolt holes.
- Install the exhaust riser and tighten the fasteners according to the engine manufacturer's specified sequence and torque.
- Reconnect hoses and other removed connections.
- Restore the cooling system according to the manufacturer's procedure.
- Start the engine and inspect the joint for exhaust or water leaks before returning the boat to service.
Troubleshooting & FAQ
How do I confirm this gasket fits my engine?
Check that your engine is one of the listed Volvo Penta AQ-series models, then compare the old gasket, manifold-to-riser bolt pattern, and documented replacement references 835908 or 856039. If the pattern or part reference differs, consult the engine service manual or a qualified marine mechanic.
Does the package include one gasket or two?
This listing includes two exhaust manifold-to-riser gaskets. They may be used on both sides of a V-engine when both sides use the same gasket and the application is confirmed.
What are the signs of a failing exhaust riser gasket?
Possible symptoms include external leakage at the manifold-to-riser joint, visible steam or water around the exhaust connection, exhaust noise, cooling-system loss, or overheating. Continued operation with a leaking exhaust gasket can cause additional engine damage.
Should the gasket be reused?
No. Replace the gasket whenever the exhaust riser or manifold is removed. Clean and inspect both mating surfaces before installing the replacement.
Is this an OEM gasket?
This is an aftermarket replacement gasket. Volvo Penta 835908 and 856039 are provided as replacement references for identification and fitment comparison.
Is installation professional service recommended?
Yes. Exhaust and cooling-system work should be performed by a qualified marine technician when the correct torque, sealing surfaces, or engine-specific service procedure cannot be confirmed.
What is the warranty and return policy?
Warranty and returns are subject to the seller's current policy. Contact support before installation if the part does not match the confirmed application.
Safety & Important Info
- Verify the engine model, manifold and riser configuration, bolt pattern, and replacement reference before ordering.
- Do not install a gasket on damaged, corroded, warped, or contaminated mating surfaces.
- Allow the engine to cool completely before beginning work.
- Follow the engine manufacturer's service manual for fastener torque, coolant handling, and post-installation checks.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world boating conditions.
- Fast Global Fulfillment — Standard delivery options and estimated transit times are shown at checkout where available.
- Manufacturer-Direct Value — Fair pricing without unnecessary markup.
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