Exhaust Manifold Gasket – Fits OMC/Volvo Penta/Mercury V6/V8 (Replaces 3852455, 908717)
Exhaust Manifold Gasket – Fits OMC/Volvo Penta/Mercury V6/V8 (Replaces 3852455, 908717) 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 Manifold Gasket – Fits OMC/Volvo Penta/Mercury V6/V8 (Repla...
Product Details
This high-quality Exhaust Manifold Gasket – Fits OMC/Volvo Penta/Mercury V6/V8 creates a secure seal between the exhaust manifold and the engine block. It is designed for a wide range of OMC, Johnson, and Evinrude V6/V8 stern drive engines from 1974–1993, and also serves as a replacement for specific Mercury and Volvo Penta parts.
This part provides a direct interchange for OMC 3852455, 3853742, 908717, 916262; Mercury 27-54566, 27-73866; Sierra 18-0183; and Volvo Penta 3852455.
- Installs between the exhaust manifold and engine block to prevent exhaust leaks.
- Engineered to seal effectively in high-temperature marine environments.
- Package contents may vary; confirm details before ordering (e.g., GLM provides a 2-pack).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 3852455 / 3853742 / 908717 / 916262 |
| Mercury | 27-54566 / 27-73866 |
| Volvo Penta | 3852455 |
| Sierra | 18-0183 |
| GLM | 33790 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For OMC Stern Drive models:
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| OMC | 120 | 120 | 1974–1977 | 3852455 | Models 990207FF, 990207R, 990207R1, 990215FF, 990215R, 990215R1, 990223A, 990223A1, 990224A, 990224A1, 990223A11, 990224A11, 990234M, 990235M, 990234E, 990234E1, 990235E, 990235E1 |
| OMC | 140 | 140 | 1974–1977 | 3852455 | Models 990216FF, 990216R, 990216R1, 990217FF, 990217R, 990217R1, 990225A, 990225A1, 990226A, 990226A1, 990225A11, 990226A11, 990236M, 990237M, 990236E, 990236E1, 990237E, 990237E1 |
| OMC | 165 | 165 | 1974–1976 | 3852455 | Models 990210R, 990210R1, 990218R, 990218R1, 990210R2, 990218R2, 990227A, 990227A1, 990228A, 990228A1, 990227A11, 990228A11, 990239M |
| OMC | 170 | 170 | 1974 | 3852455 | Model 990221R |
| OMC | 175 | 175 | 1975–1977 | 3852455 | Models 990229A, 990229A1, 990230A, 990229A11, 990229M, 990230A11, 990230M, 990229E, 990229G, 990230E, 990230G |
| OMC | 185 | 185 | 1978–1979 | 3852455 | Models 990252D, 990252H, 990252J, 990253D, 990253H, 990253J, 990252S, 990252S1, 990253S, 990253S1 |
| OMC | 190 | 190 | 1974–1977 | 3852455 | Models 990220R, 990220R2, 990231A, 990231A1, 990232A, 990231A11, 990231M, 990232A11, 990232M, 990231E, 990231G, 990232E, 990232G |
| OMC | 200 | 200 | 1979 | 3852455 | Models 990260S, 990260S1, 990266S, 990266S1, 990267S, 990267S1 |
| OMC | 225 | 225 | 1974–1978 | 3852455 | Models 990211R, 990211R1, 990211A, 990211A1, 990211R11, 990211A11, 990211M, 990254D, 990254H, 990254J, 990255D, 990255H, 990255J |
| OMC | 230 | 230 | 1979 | 3852455 | Models 990254S, 990254S1, 990254V, 990255S, 990255S1, 990255V, 990261S, 990261S1 |
| OMC | 235 | 235 | 1975–1977 | 3852455 | Models 990240A, 990241A, 990240A11, 990240M, 990241A11, 990241M, 990240E, 990240G, 990241E, 990241G |
| OMC | 240 | 240 | 1978 | 3852455 | Models 990250D, 990250H, 990250J, 990250N, 990250P, 990250U, 990251D, 990251H, 990251J, 990251N, 990251U |
| OMC | 245 | 245 | 1974–1975 | 3852455 | Models 990212R, 990212R1, 990212A |
| OMC | 250 | 250 | 1979 | 3852455 | Model 990251S |
| OMC | 260 | 260 | 1979 | 3852455 | Models 990256S, 990256S1, 990257S, 990257S1, 990262S, 990262S1 |
| OMC | 5.0 | 1989–1993 | 3852455 | Models 502AMLMED, 502APRMED, 502BPRMED, 502AMLPWS, 502APRPWS, 502BPRPWS, 502APLRGD, 502APRRGD, 502APLAMH, 502APLAMK, 502APRAMH, 502APRAMK, 502BPRAMH, 502BPRAMK, 502APLJVB, 502APRJVB, 502BPRJVB, 50FAPLJVB, 50FAPLJVN, 50FAPRJVB, 50FAPRJVN | |
| OMC | 5.8 | 1989–1993 | 3852455 | Models 584AMLMED, 584APRMED, 584AMLPWS, 584APRPWS, 584APLRGD, 584APRRGD, 584APLAMH, 584APLAMK, 584APRAMH, 584APRAMK, 584DPEAMH, 584DPEAMK, 584APLJVB, 584APRJVB, 58FAPLJVB, 58FAPLJVN, 58FAPRJVB, 58FAPRJVN |
Technical Specs
- Product Type
- Exhaust Manifold Gasket
- Installation
- Between exhaust manifold and engine block
- Package Quantity
- Varies by manufacturer (GLM provides 2-pack)
- Dimensions
- 43.0" L x 8.5" W x 0.5" H
- Weight
- 90.7g (3.2 oz)
- Warranty
- 1 Year (varies by manufacturer)
- Other Technical Attributes
- Seals exhaust manifold to prevent exhaust leaks
What’s in the Box
- 1 x Exhaust Manifold Gasket (equivalent to OEM part numbers 3852455, 3853742, 908717)
- Note: The GLM #33790 aftermarket package includes a 2-pack of gaskets.
Installation Notes
- Disconnect the battery and allow the engine to cool completely.
- Drain the engine coolant to a level below the exhaust manifolds.
- Carefully unplug any sensors and disconnect hoses attached to the manifold.
- Remove the bolts securing the exhaust manifold to the engine block and riser, then remove the manifold.
- Remove the old gasket and thoroughly clean both mating surfaces on the engine block and the manifold. Ensure they are free of all old gasket material, rust, and debris.
- Position the new gasket correctly on the engine block; it should align perfectly with the bolt holes and ports.
- Reinstall the exhaust manifold, starting all bolts by hand to prevent cross-threading.
- Tighten the manifold bolts in the sequence and to the torque specifications recommended in your engine's service manual.
- Reconnect all hoses and sensors.
- Refill the engine with coolant.
- Start the engine and carefully check for any exhaust or coolant leaks around the manifold.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
First, check the Part Number Matrix to see if your old part number is listed as a cross-reference. Then, review the Engine & Model Compatibility table to find your specific engine model and year. For final confirmation, always compare the product images to your original part before ordering.
What are the signs of a failed exhaust manifold gasket?
Common signs of a bad gasket include unusually loud engine noise (ticking or puffing sounds) from the engine bay, visible black soot streaks around the manifold seal, the smell of exhaust fumes near the engine, and a potential loss of engine performance or fuel efficiency.
How often should this gasket be replaced?
The gasket should be replaced any time the exhaust manifold is removed for other service or as soon as any signs of failure are detected. There is no set replacement interval; its lifespan depends on operating conditions and engine health.
Is any sealant required when installing this gasket?
Most gaskets of this type are designed for dry installation. Using sealant can sometimes interfere with a proper seal. We strongly recommend consulting your official service manual for the manufacturer's specific procedure for your engine model.
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.
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