Exhaust Divider Plate Gasket – Fits Mercury/Mercruiser 2.0L/2.4L V6 (Replaces 27-904841)
Exhaust Divider Plate Gasket – Fits Mercury/Mercruiser 2.0L/2.4L V6 (Replaces 27-904841) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Divider Plate Gasket – Fits Mercury/Mercruiser 2.0L/2.4L V6...
Product Details
This high-quality Exhaust Divider Plate Gasket is engineered for Mercury/Mariner 135-200 HP V6 2.0L/2.4L engines from 1983–1991. It serves as a crucial seal within the exhaust system for various Mercury/Mercruiser V6 outboard and sterndrive applications, ensuring peak engine performance and preventing leaks.
It functions as a direct replacement for multiple part numbers, including Mercury 27-904841, Sierra 18-2904, GLM 32150, and Mallory 9-65431. This part is designed to meet or exceed original equipment specifications for a reliable fit and long-lasting service life.
- Installs in the engine exhaust system.
- Sold individually; two gaskets are typically required per engine.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | 27-904841 | |
| Mercury | 27-90484 | 27-904841 |
| Mercury | 27-87396 | 27-904841 |
| Sierra | 18-2904 | |
| GLM | 32150 | |
| Mallory | 9-65431 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket fits a range of V6 outboards under the Mercury and Mariner brands, as well as several Mercury Racing/Performance models.
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | V-135 | 135 | 1983–1991 | 27-904841 | Serial #0C100861-0C239552 |
| Mercury | V-150 | 150 | 1983–1991 | 27-904841 | Serial #0C100861-0C239552, #4868998-0A904645, #5600162-0A904645 |
| Mercury | V-150 Magnum | 150 | 1983–1985 | 27-904841 | Serial #5600162-0A904645 |
| Mercury | V-150 Marathon | 150 | 1983–1985 | 27-904841 | Serial #5600162-0A904645 |
| Mercury | V-150 Work | 150 | 1983–1985 | 27-904841 | Serial #4868998-0A904645 |
| Mercury | V-150-XR-2 | 150 | 1983–1985 | 27-904841 | Serial #4868998-0A904645 |
| Mercury | V-1500 | 150 | 1983–1985 | 27-904841 | Serial #4868998-0A904645, #5600162-0A904645 |
| Mercury | V-175 | 175 | 1983–1991 | 27-904841 | Serial #0C100861-0C239552, #4301235-0C100860, #8058870 & Up |
| Mercury | V-175 (SKI) | 175 | 1983–1991 | 27-904841 | Serial #0C100861-0C239552 |
| Mercury | V-200 | 200 | 1983–1991 | 27-904841 | Serial #0C100861-0C291519, #5624878-0C100860 |
| Mercury | V-200 (EFI) | 200 | 1983–1991 | 27-904841 | Serial #0C100861-0C999999 |
| Mercury | XR-4 | 1983–1991 | 27-904841 | Serial #0C100861-0C239552 | |
| Mercury | MAGNUM II | 1983–1991 | 27-904841 | Serial #0C100861-0C239552 |
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Mercury | MERC MOD-VP (EFI) | 27-904841 | Serial #0C276380 AND UP |
| Mercury | MERC XR2 | 27-904841 | Serial #0B290314-0C276429 |
| Mercury | MERC/MAR 2.4L (CARB) | 27-904841 | Serial #0C175045 AND UP |
| Mercury | MERC/MAR 2.4L (EFI) | 27-904841 | Serial #0B290010-0C276917 |
Technical Specs
- Product Type
- Exhaust Divider Plate Gasket
- Installation
- Exhaust System
- Dimensions
- 22.0 × 7.0 × 0.25 inches (558.8 × 177.8 × 6.35 mm)
- Weight
- 0.06 lb (0.027 kg)
- Warranty
- OEM Mercury parts warranty
- Notes
- Sold individually; typically requires 2 per engine
What’s in the Box
- 1 x Gasket (27-904841)
Installation Notes
- Disconnect the battery and ensure the engine is cool to the touch.
- Access the exhaust divider plate, removing any covers or components blocking it.
- Carefully unbolt and remove the old divider plate and its gaskets.
- Thoroughly clean the mating surfaces, removing all old gasket material and debris. A clean, smooth surface is critical for a good seal.
- Position the new gaskets correctly on each side of the divider plate.
- Reinstall the divider plate assembly, ensuring bolts are torqued to the manufacturer’s specified values and sequence.
- Reconnect the battery and test the engine, checking for any signs of exhaust leaks.
Troubleshooting & FAQ
How do I know if I need one or two gaskets?
For most supported V6 engine applications, two gaskets are required per engine—one for each side of the exhaust divider plate. This part is sold individually, so be sure to order the correct quantity for your specific repair.
What are the signs of a failing exhaust divider gasket?
Common symptoms include a noticeable exhaust leak (hissing or popping sound) from the engine block, water in the cylinders, engine overheating, or a loss of power. A visual inspection may also reveal soot or water stains around the plate.
Why is my engine serial number important?
Mercury/Mercruiser often uses specific serial number ranges to identify changes in parts during a model’s production run. Checking your engine’s serial number against the ranges in the compatibility table is the best way to confirm an exact fit.
Can I reuse my old gaskets?
No. Gaskets are single-use components designed to compress and create a seal. Reusing an old gasket will almost certainly result in leaks, poor performance, and potential engine damage. Always use new gaskets during installation.
What is the difference between part 27-904841 and 27-87396?
The part number 27-904841 is the latest version from Mercury. It supersedes older part numbers like 27-87396 and 27-90484. This aftermarket part is designed to be a direct replacement for all these numbers.
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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