Exhaust Elbow Riser Gasket – Fits Volvo Penta V6 V8 4.3L 5.0L 5.7L 8.1L (Replaces 857618, 835908, 856039)

Product Details

This Exhaust Elbow Riser Gasket is engineered for Volvo Penta V6 and V8 marine engines, including 4.3L, 5.0L, 5.7L, and 8.1L models. Designed to seal the connection between the exhaust elbow and riser on engines with a 3-3/4" exhaust outlet, this gasket ensures reliable exhaust flow and prevents leaks in AQ, DP, SP, BB, and MS series engine models.

This aftermarket replacement directly substitutes Volvo Penta part numbers 857618, 835908, and 856039, as well as Quicksilver 803356.

• Compatible with Volvo Penta AQ200, AQ225, AQ260, AQ271, AQ290, AQ311, and additional V6/V8 series
• Fits engines with 3-3/4" exhaust outlet diameter
• Sold as a pair for dual-engine installations or future replacement

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Application

Exhaust elbow to riser connection

Exhaust Outlet Diameter

3-3/4"

Engine Type

Volvo Penta V6 and V8 marine engines

Displacement Compatibility

4.3L, 5.0L, 5.7L, 8.1L

OEM Equivalent

857618, 835908, 856039

What's in the Box

• 2 × Exhaust Elbow Riser Gasket

Installation Notes

1. Disconnect the battery and allow the engine to cool completely before beginning work.
2. Remove the exhaust elbow from the riser by loosening the mounting bolts or clamps.
3. Clean both the elbow and riser mating surfaces thoroughly, removing all old gasket material and carbon buildup.
4. Inspect the surfaces for warping, cracks, or corrosion; repair or replace components if necessary.
5. Place the new gasket onto the riser, aligning all bolt holes precisely.
6. Position the exhaust elbow over the gasket and hand-thread all mounting bolts to prevent cross-threading.
7. Torque the bolts in a cross-pattern to the manufacturer's specified value to ensure even compression.
8. Reconnect all hoses, clamps, and electrical connections removed during disassembly.
9. Reconnect the battery and perform a leak test by running the engine and inspecting the gasket area for exhaust or coolant seepage.

Troubleshooting & FAQ

How do I know if my exhaust elbow gasket is failing?

Common signs include visible exhaust leaks near the elbow-to-riser joint, steam or water vapor escaping from the connection, rough idle or loss of power, and corrosion around the mounting area. If you detect a sulfurous smell or see discoloration on the gasket surface, replacement is recommended.

Can I reuse the old gasket if it looks intact?

No. Exhaust gaskets are designed for single use and compress permanently during initial installation. Reusing an old gasket will likely result in exhaust or coolant leaks, even if it appears undamaged.

What torque specification should I use for the elbow bolts?

Always refer to your engine's service manual for exact torque values, as they vary by model. Typical specifications for Volvo Penta V6/V8 exhaust connections range from 15 to 25 ft-lbs. Use a cross-pattern tightening sequence to ensure even gasket compression.

Will this gasket fit engines with a different exhaust outlet size?

This gasket is designed exclusively for Volvo Penta engines with a 3-3/4" exhaust outlet. Using it on a different outlet diameter will result in improper sealing and potential exhaust or coolant leaks.

How often should I replace the exhaust elbow gasket?

Replace the gasket any time the exhaust elbow is removed for service or inspection. Additionally, inspect the gasket annually or every 100 hours of operation for signs of deterioration, especially in saltwater environments.

Do I need to apply sealant to this gasket?

Generally, no additional sealant is required if the mating surfaces are clean, flat, and properly torqued. However, some technicians apply a thin coat of high-temperature gasket sealant for added insurance in high-stress applications. Consult your engine manual for manufacturer recommendations.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 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 against 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.