Water Pump Impeller Kit with Housing – Fits OMC Cobra Stern Drives (Replaces 984461, 983895, 984744)
Water Pump Impeller Kit with Housing – Fits OMC Cobra Stern Drives (Replaces 984461, 983895, 984744) 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
Water Pump Impeller Kit with Housing – Fits OMC Cobra Stern Drives ...
Product Details
This complete Water Pump Impeller Kit with Housing is engineered for OMC Cobra stern drive units manufactured between 1986 and 1993, fitting a wide range of engines from 2.3L to 7.5L. The kit includes a full water pump assembly designed for external, stern drive mounted applications, ensuring reliable engine cooling.
It serves as a direct interchange for several part numbers, including OMC 984461 and 984744, Sierra 18-3348 and 18-3212-1, and GLM 12092.
- Designed for external installation on the stern drive unit.
- Features a durable aluminum alloy housing for corrosion resistance.
- Includes essential stainless steel components like the wear plate and liner for longevity.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| OMC | 984461 |
| OMC | 984744 |
| Sierra | 18-3348 |
| Sierra | 18-3212-1 |
| GLM | 12092 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This kit is designed exclusively for OMC Cobra stern drive models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra 2.3L | 120-140 | 4-Stroke | 1987–1990 | 984461/984744 | |
| OMC | Cobra 2.5L | 150 | 4-Stroke | 1986 | 984461/984744 | |
| OMC | Cobra 3.0L | 130-180 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 4.3L | 205-230 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 4.6L | 235 | 4-Stroke | 1989 | 984461/984744 | |
| OMC | Cobra 5.0L | 260 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 5.7L | 260-300 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 5.8L | 351 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 7.4L | 340 | 4-Stroke | 1986–1993 | 984461/984744 | |
| OMC | Cobra 7.5L | 365-415 | 4-Stroke | 1986–1993 | 984461/984744 |
Technical Specs
- Product Type
- Water Pump Impeller Kit with Housing
- Installation
- External, stern drive mounted
- Housing Material
- Aluminum alloy
- Housing Color
- Silver/metallic
- Other Technical Attributes
- Includes stainless steel wear plate and liner
- Warranty
- 1 Year (GHmarine brand)
What’s in the Box
- 1 x Housing (984744)
- 1 x Impeller (777128/983895)
- 1 x Stainless steel liner (911844/764197)
- 1 x Stainless steel wear plate (911703)
- 1 x Gasket (911702)
- 1 x O-ring seal (911704)
Installation Notes
- Disconnect the battery terminals to prevent accidental starting.
- Remove the stern drive unit from the transom assembly according to your service manual.
- Locate and unbolt the existing water pump housing. Carefully remove the old assembly.
- Thoroughly clean the mounting surface, ensuring it is free of old gasket material and corrosion.
- Install the new gasket, wear plate, and liner included in the kit.
- Press the new impeller into the housing. Lubricate with marine grease or soapy water.
- Secure the new pump housing assembly with the provided O-ring and hardware, tightening bolts to the manufacturer's specified torque.
- Reinstall the stern drive unit, reconnect the battery, and test the engine on a water supply to verify proper cooling system operation.
Troubleshooting & FAQ
How do I know if this kit fits my OMC Cobra?
This kit fits OMC Cobra stern drives from 1986–1993, covering engines from 2.3L to 7.5L. Always verify your model and year against the compatibility table and cross-reference your existing part number with OEM numbers 984461 or 984744 to ensure a perfect match.
What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or nonexistent water stream from the tell-tale outlet, and visible damage like cracks, brittleness, or missing vanes on the old impeller upon inspection.
What is the recommended replacement interval?
For preventative maintenance, we recommend inspecting the impeller annually and replacing it every 1-2 seasons or 100-200 hours of operation. More frequent replacement may be necessary if you regularly operate in saltwater or shallow, debris-heavy waters.
Does this kit include the housing?
Yes, this is a complete kit that contains the water pump housing, impeller, stainless steel wear plate, stainless steel liner, gasket, and O-ring seal for a full replacement.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to meet or exceed OEM-level specifications with comparable materials and performance. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions; expedited options will appear at checkout if available for your location.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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 rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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