Water Pump Impeller Kit – Fits OMC Cobra Stern Drives 2.3–7.5L (Replaces 984461, 983895, 984744)
Water Pump Impeller Kit – Fits OMC Cobra Stern Drives 2.3–7.5L (Replaces 984461, 983895, 984744) 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
Water Pump Impeller Kit – Fits OMC Cobra Stern Drives 2.3–7.5L (Rep...
Product Details
This Water Pump Impeller Kit – Fits OMC Cobra Stern Drives 2.3–7.5L is a complete assembly designed for reliable performance in OMC Cobra stern drive applications from 1986 through 1993. It provides an effective solution for maintaining your engine’s cooling system, covering a wide range of engine sizes from 2.3L to 7.5L.
This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, including Sierra 18-3348, OMC 984461, 983895, and 984744, as well as GLM 12091 and EMP 46-03638.
- Engineered for direct-fit installation.
- Features a durable nylon/plastic housing.
- Note: This kit is not compatible with King Cobra OMC models.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sierra | 18-3348 |
| Mercury/Quicksilver | 18-3348 |
| OMC | 984461 / 983895 / 984744 |
| EMP | 46-03638 |
| GLM | 12091 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for OMC Cobra stern drive engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| OMC Cobra | Stern Drive | 2.3L | 4-Stroke | 1987–1990 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 2.5L | 4-Stroke | 1986 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 3.0L | 4-Stroke | 1986–1993 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 4.3L | 4-Stroke | 1986–1993 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 4.6L | 4-Stroke | 1989 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 5.0L | 4-Stroke | 1986–1993 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 5.7L | 4-Stroke | 1986–1993 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 5.8L | 4-Stroke | 1989–1993 | 984461/983895/984744 |
| OMC Cobra | Stern Drive | 7.5L | 4-Stroke | 1987–1989 | 984461/983895/984744 |
Technical Specs
- Product Type
- Water Pump Impeller Kit with Housing
- Installation
- Direct Replacement
- Connection
- OEM Standard Mounting
- Housing Material
- Nylon/Plastic
- Housing Color
- Black
- Weight
- 0.38 kg (0.84 lb)
- Fitting Type
- OEM Specification
- Warranty
- Manufacturer dependent, typically 1 year
- Other Technical Attributes
- Not compatible with King Cobra OMC models
What’s in the Box
- 1 x Water Pump Impeller (Replaces OMC 777128/765582)
- 1 x Impeller Wear Plate
- 1 x Pump Housing
- 1 x Pump Liner
- 1 x Gasket
- 1 x O-ring
Installation Notes
- Disconnect the battery and ensure the engine is cool. Drain the cooling system as needed to access the water pump.
- Carefully remove the old water pump housing and impeller assembly, noting the orientation of hoses and fasteners.
- Clean all gasket and sealing surfaces thoroughly to remove any old debris or sealant.
- Install the new wear plate, gasket, and impeller into the new housing. Lubricate the impeller with a suitable marine grease or soapy water.
- Mount the new water pump assembly, ensuring all seals and gaskets are correctly positioned. Tighten fasteners to the manufacturer's recommended torque specifications.
- Reconnect all hoses and refill the cooling system. Reconnect the battery, start the engine, and check for leaks and proper water flow.
Troubleshooting & FAQ
How can I confirm this kit fits my engine?
This kit is specifically for OMC Cobra stern drives (not King Cobra) made between 1986 and 1993. Verify your engine model and year against the compatibility table. It's also critical to visually match your old part to our product photos and check the OEM part numbers (984461, 983895, 984744).
Does this kit fit OMC King Cobra models?
No, this kit is not compatible with any OMC King Cobra models. Using it on a King Cobra drive will result in improper fitment and cooling system failure.
What are the signs of a failing water pump impeller?
Common signs include the engine running hotter than normal or overheating, a weak or non-existent stream of water from the tell-tale outlet, and visible cracks, stiffness, or broken vanes on the old impeller upon inspection.
How often should a water pump impeller be replaced?
For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, depending on usage (hours) and operating conditions (saltwater vs. freshwater).
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.
Payment & Security
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