Exhaust Elbow Gasket – Fits Volvo Penta/OMC Stern Drive 2.5L & 3.0L (Replaces 3850495, 908013)
Exhaust Elbow Gasket – Fits Volvo Penta/OMC Stern Drive 2.5L & 3.0L (Replaces 3850495, 908013) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Elbow Gasket – Fits Volvo Penta/OMC Stern Drive 2.5L & ...
Product Details
This high-quality Exhaust Elbow Gasket creates a secure, leak-free seal between the exhaust manifold and the riser or elbow. It is designed specifically for Volvo Penta 2.5L (120hp) and 3.0L (140hp) 4-stroke engines, as well as OMC Stern Drive 2.5L and 3.0L 4-stroke models.
This part is a direct replacement for several OEM and aftermarket part numbers, including Volvo Penta 3850495, OMC 908013 and 33770, Sierra 18-2875, GLM Marine 33770, and Mallory 9-42800.
- Ensures a secure, reliable seal to prevent exhaust leaks.
- Engineered for direct bolt-on installation with no modifications required.
- Made from durable composite material to withstand the harsh marine environment.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3850495 |
| OMC | 908013, 33770 |
| Sierra | 18-2875 |
| GLM Marine | 33770 |
| Mallory | 9-42800 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits a range of 4-stroke models from the OMC Stern Drive and Inboard lines.
Compatible with select Volvo Penta 4-stroke inboard/outboard engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| OMC | Stern Drive 3.0L | 140 | 4-Stroke | 908013, 33770 | Cobra model |
| OMC | Stern Drive 2.5L | 120 | 4-Stroke | 908013, 33770 | |
| OMC | Inboard | 305 | 4-Stroke | 908013, 33770 | |
| OMC | Stern Drive | 185-260 | 4-Stroke | 908013, 33770 | Multiple models: 185, 200, 225, 230, 240, 250, 260 |
| OMC | Stern Drive | 350 | 4-Stroke | 908013, 33770 | |
| Volvo Penta | 3.0L/181CI | 140 | 4-Stroke | 3850495 | |
| Volvo Penta | 2.5L/153CI | 120 | 4-Stroke | 3850495 |
Technical Specs
- Product Type
- Exhaust Elbow Gasket
- Installation
- Direct replacement, bolt-on
- Connection
- Exhaust manifold to riser/elbow
- Housing Material
- Composite
- Dimensions
- 13.0 x 12.5 x 2.0 inches (330.2 x 317.5 x 50.8 mm)
- Weight
- 1 pound (0.45 kg)
- Other Technical Attributes
- Creates a secure seal between the exhaust elbow and manifold/riser
What’s in the Box
- 2 x Exhaust Elbow Gasket (Replaces 3850495/908013)
Installation Notes
- Ensure the engine is completely cool before beginning work.
- Disconnect the battery to prevent accidental starting.
- Close the water intake seacock. Drain water from the exhaust manifold.
- Carefully disconnect any hoses attached to the exhaust elbow/riser.
- Unbolt and remove the old elbow/riser from the exhaust manifold.
- Thoroughly clean both mating surfaces, removing all traces of the old gasket and any corrosion.
- Place the new gasket onto the manifold, aligning the bolt holes.
- Reinstall the elbow/riser and tighten the bolts to the manufacturer's specified torque in the correct sequence.
- Reconnect all hoses, open the seacock, and reconnect the battery.
- Start the engine and carefully check for any exhaust or water leaks.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific engine model and year?
The best method is to cross-reference your existing part number with those listed in our Part Number Matrix. Additionally, consult the Engine & Model Compatibility table. If your part number or engine model is not listed, this gasket may not be the correct fit.
What are the common signs of a failed exhaust elbow gasket?
Symptoms of a bad gasket include water leaking externally from the joint between the manifold and elbow, rust stains in this area, or engine overheating. Internal leaks can also allow water to enter the engine cylinders, causing significant damage.
Is this gasket sold individually or as a pair?
This package contains two gaskets, suitable for servicing engines that require one on each side or for keeping a spare. Please verify the contents listed under "What's in the Box."
Can I reuse my old gasket after removing the exhaust elbow?
No. Gaskets are designed for single use. They compress and form a seal that is compromised upon removal. Always use a new gasket during reassembly to ensure a leak-proof connection.
What is the recommended replacement interval?
There is no fixed replacement interval. Gaskets should be replaced whenever the exhaust manifold or riser/elbow is removed for service or inspection. They should also be replaced immediately if signs of a leak are detected.
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 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
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