Upper Water Pump Gasket – Fits Mercury/Mariner 25-60HP Outboards (Replaces 822189, 27-822189)
Upper Water Pump Gasket – Fits Mercury/Mariner 25-60HP Outboards (Replaces 822189, 27-822189) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Upper Water Pump Gasket – Fits Mercury/Mariner 25-60HP Outboards (R...
Product Details
This Upper Water Pump Gasket provides a reliable seal for the water pump assembly on a range of Mercury/Mariner 25-60HP 2-stroke and 4-stroke outboards (1994-present) and select Force 75HP engines. It is a crucial component for maintaining cooling system integrity and preventing leaks.
Serves as a direct replacement for Quicksilver part numbers 822189 and 27-822189, Sierra 18-0345, and GLM 37490.
- For optimal performance, this gasket should be replaced whenever the water pump impeller is serviced.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Quicksilver | 822189 / 27-822189 |
| Sierra | 18-0345 |
| GLM | 37490 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure correct fitment.
Mercury/Mariner: This gasket fits a wide variety of 2-stroke and 4-stroke outboards from 25HP to 60HP, manufactured from 1994 to the present.
Force: Compatibility is noted for some 75HP models. Verify your specific model and part number before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | 25 | 25 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 30 | 30 | 2-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 30 | 30 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 40 | 40 | 2-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 40 | 40 | 3-Cylinder | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 40 | 40 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 45 BODENSEE | 45 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 45 JET | 45 | Various | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 50 | 50 | 3-Cylinder | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 50 | 50 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 50 BIGFOOT | 50 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 50 EFI | 50 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 55 | 55 | 3-Cylinder | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 60 | 60 | 3-Cylinder | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 60 BIGFOOT | 60 | 3-Cylinder | 1994–present | 822189/27-822189 | |
| Mercury/Mariner | 60 EFI | 60 | 4-Stroke | 1994–present | 822189/27-822189 | |
| Force | 75 | 75 | Various | 822189/27-822189 |
Technical Specs
- Product Type
- Upper Water Pump Gasket
- Installation
- Replace when servicing water pump impellers
- Dimensions
- 5.5 x 4.0 x 0.13 inches
- Weight
- 7 grams (0.02 pounds)
- Country of Origin
- Venezuela
- Warranty
- Limited 1 year warranty
- Package Quantity
- 1
What’s in the Box
- 1 x Upper Water Pump Gasket (822189/27-822189)
Installation Notes
- Ensure the engine is off and the battery is disconnected before starting work.
- Remove the lower unit (gearcase) from the outboard engine.
- Unbolt and remove the water pump housing to access the impeller and gaskets.
- Carefully remove the old upper gasket, taking care not to gouge the mounting surfaces.
- Clean both the pump housing and the base plate surfaces thoroughly to remove any old gasket material or corrosion.
- Position the new gasket correctly onto the clean surface.
- Reinstall the water pump components, including the new impeller if performing a full service.
- Tighten all bolts to the manufacturer's specified torque settings.
- Reinstall the lower unit, refill with gear lube, and test the engine's cooling system using a water supply before operation.
Troubleshooting & FAQ
How do I know if this gasket will fit my exact engine model?
The best way to confirm is by checking your original part number against the ones listed in our Part Number Matrix. You can also review the detailed Engine & Model Compatibility table on this page. If you are still unsure, please contact us with your engine's model and serial number before ordering.
What are the signs of a failing water pump gasket?
A failed upper water pump gasket can cause a water leak around the pump housing, leading to an overheating engine, reduced water pressure (weak "telltale" stream), or water intrusion into the gearcase. It should be replaced as part of regular impeller service to prevent these issues.
Can I reuse my old gasket?
No. Gaskets compress to create a seal and are designed for single use. Reusing an old gasket will likely result in an improper seal, leading to leaks and potential engine damage. Always use a new gasket when servicing the water pump.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9001 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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