Water Pump Kit – Fits OMC Cobra 2.3L, 2.5L, 3.0L (1986-1993) (Replaces 984461, 983895, 984744)
Water Pump Kit – Fits OMC Cobra 2.3L, 2.5L, 3.0L (1986-1993) (Replaces 984461, 983895, 984744) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Water Pump Kit – Fits OMC Cobra 2.3L, 2.5L, 3.0L (1986-1993) (Repla...
Water Pump Kit – Fits OMC Cobra 2.3L, 2.5L, 3.0L (1986-1993) (Replaces 984461, 983895, 984744) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Kit – Fits OMC Cobra 2.3L, 2.5L, 3.0L (1986-1993) is a complete aftermarket solution for OMC Cobra sterndrive engines with 2.3L (1987–1990), 2.5L (1986–1993), and 3.0L (1986–1993) displacements. It is designed to restore your engine's cooling system to its original performance.
This kit serves as a direct replacement for OEM part numbers OMC 984461, 983895, and 984744, as well as aftermarket equivalents GLM 12091, Sierra 18-3348, and Mallory 9-45285.
- Engineered with corrosion-resistant materials for saltwater and freshwater use.
- Installs externally on the sterndrive unit for direct-fit replacement.
- Includes a complete set of components for a full service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 984461 |
| OMC | 983895 |
| OMC | 984744 |
| GLM | 12091 |
| Sierra | 18-3348 |
| Mallory | 9-45285 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Stroke | Years | OEM Part No. |
|---|---|---|---|---|
| OMC | Cobra 2.3L | 4-Stroke | 1987–1990 | 984461 |
| OMC | Cobra 2.5L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 3.0L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 4.3L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 5.0L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 5.7L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 5.8L | 4-Stroke | 1986–1993 | 984461 |
| OMC | Cobra 7.5L | 4-Stroke | 1987–1989 | 984461 |
Technical Specs
- Product Type
- Water Pump Kit
- Installation
- External mounting on stern drive
- Connection
- Direct fit to OMC Cobra sterndrive
- Housing Material
- ABS and stainless steel
- Fitting Type
- Direct bolt-on
- Attribute
- Designed for salt water use with corrosion resistance
What’s in the Box
- 1 x Impeller (777128)
- 1 x Wear Plate (911703)
- 1 x Gasket (911702)
- 1 x Seal (911704)
- 1 x Liner/Cup (764197)
- 1 x Housing (984744)
Installation Notes
- Disconnect the boat's battery before beginning work.
- Remove the sterndrive unit from the transom gimbal housing assembly.
- Locate and carefully unbolt the water pump housing to access the old components.
- Remove the old impeller, gasket, wear plate, liner, and seals, noting their orientation.
- Thoroughly clean all mating surfaces to ensure they are free of old gasket material and corrosion.
- Install the new components from the kit in the reverse order of removal. Ensure the impeller vanes are oriented correctly.
- Secure the housing with the new gasket and torque bolts to the manufacturer's specified values.
- Reinstall the sterndrive unit, reconnect the battery, and test the engine's cooling system at the dock before heading out.
Troubleshooting & FAQ
How can I confirm this kit fits my engine?
Verify your engine model and year range are listed in the "Engine & Model Compatibility" table. For the best match, cross-reference the part number from your existing water pump with the numbers in our "Part Number Matrix".
What are the signs of a failing water pump?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the tell-tale outlet, and visible damage like cracks, brittleness, or missing vanes on the old impeller upon inspection.
How often should the water pump kit be replaced?
For preventative maintenance, it is recommended to replace the water pump impeller and gaskets every 1 to 2 years or every 100-200 hours of operation, whichever comes first. Service intervals should be shorter if you operate frequently in saltwater or sandy/silty conditions.
Is this a difficult installation?
This procedure requires removal of the sterndrive, which involves moderate to advanced mechanical skill. If you are not experienced with sterndrive service, we strongly recommend professional installation to ensure correct assembly and function.
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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