Water Pump Impeller Repair Kit – Fits OMC Cobra 2.3L–7.5L Stern Drives (Replaces 984461, 983895, 777128)
Water Pump Impeller Repair Kit – Fits OMC Cobra 2.3L–7.5L Stern Drives (Replaces 984461, 983895, 777128) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Repair Kit – Fits OMC Cobra 2.3L–7.5L Stern Dri...
Water Pump Impeller Repair Kit – Fits OMC Cobra 2.3L–7.5L Stern Drives (Replaces 984461, 983895, 777128) is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Impeller Repair Kit – Fits OMC Cobra 2.3L–7.5L Stern Drives (Replaces 984461, 983895, 777128) contains everything needed to service the raw water pump on OMC Cobra stern drives from 1986–1993. It is designed for V6 and V8 engine configurations ranging from 2.3L to 7.5L, providing a comprehensive solution for cooling system maintenance.
The kit serves as an aftermarket equivalent for OMC part numbers 984461/0984461, 983895, and 777128, as well as Sierra, GLM, and Mallory cross-references. It includes the water pump housing, gaskets, pump liner, impeller plate, and the neoprene impeller.
- Installation Type: External (Stern Drive Water Pump)
- Cooling System: Designed for raw water cooling systems.
- Complete Kit: Includes housing, impeller, plate, gaskets, and liner for a full replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 984461 / 0984461 |
| OMC | 983895 |
| OMC | 777128 |
| Sierra | 18-3212-1 |
| Sierra | 18-3348 |
| GLM | 12091 |
| Mallory | 9-45283 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for the following OMC Cobra stern drive models.
| Brand | Engine Size | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| OMC Cobra | 2.3L | 1987–1990 | 984461 | Except originally equipped with short impeller |
| OMC Cobra | 2.5L | 1986 | 984461 | |
| OMC Cobra | 3.0L | 1986–1993 | 984461 | Except originally equipped with short impeller |
| OMC Cobra | 4.3L | 1986–1993 | 984461 | |
| OMC Cobra | 4.6L | 1989 | 984461 | |
| OMC Cobra | 5.0L | 1986–1993 | 984461 | |
| OMC Cobra | 5.7L | 1986–1993 | 984461 | Except 1992 5.7 L.E. |
| OMC Cobra | 5.8L | 1989–1993 | 984461 | |
| OMC Cobra | 7.5L | 1987–1989 | 984461 |
Technical Specs
- Product Type
- Complete Water Pump Impeller Repair Kit
- Installation
- External (Stern Drive)
- Impeller Material
- Neoprene
- Impeller Blades
- 10
- Impeller Hub
- Plastic Hub
- Housing Material
- Plastic
- Weight
- 382.7g (13.5 oz)
- Warranty
- 1 Year (varies by manufacturer)
What’s in the Box
- 1 x Water Pump Housing (Replaces OMC 984744 / Sierra 18-3206)
- 1 x Water Pump Housing Gasket (Replaces OMC 911702 / Sierra 18-2916)
- 1 x Pump Liner (Replaces OMC 764197/911844 / Sierra 18-3145)
- 1 x Impeller Plate (Replaces OMC 911703 / Sierra 18-3121)
- 1 x Water Pump Impeller (Replaces OMC 777128/983895 / Sierra 18-3058)
- 1 x Rubber Seal (Replaces OMC 911704 / Sierra 18-2541)
- 2 x Drain Screw Gaskets (Replaces OMC 0307552/0500383) (not confirmed in all kits)
Installation Notes
- Disconnect the battery for safety before beginning any work.
- Locate the raw water pump on the stern drive. Access may require removing the drive or specific covers.
- Remove the bolts securing the old water pump housing and carefully detach it from the drive. Note the orientation of hoses.
- Clean the mounting surface and remove any old gasket material or sealant residue.
- Install the new pump liner, plate, and gaskets as provided in the kit. Lubricate the new impeller with a suitable marine lubricant.
- Install the new impeller into the housing, rotating it in the correct direction of engine rotation.
- Secure the new housing assembly with the appropriate bolts and torque to manufacturer specifications.
- Reconnect all hoses, reassemble the drive, and reconnect the battery.
- Start the engine and check for proper water flow and for any leaks around the new pump housing.
Troubleshooting & FAQ
How do I confirm if this kit fits my specific OMC Cobra engine?
The surest way is to match your engine model and year to our compatibility chart. Several engine models from 1987-1993 are noted as "Except originally equipped with short impeller." If you are unsure, visually inspect your current pump or reference your OEM service manual before ordering.
What are the signs of a failing water pump impeller?
Common symptoms include engine overheating at idle or low speeds, a weak or non-existent stream of water from the tell-tale outlet, and visible cracking, stiffness, or missing blades on the old impeller upon inspection.
How often should I replace my water pump impeller?
As a general maintenance guideline, inspect the impeller annually and replace it every 1-2 years, or after every 100-200 hours of use. Replacement frequency should be increased if you operate in sandy, silty, or saltwater conditions.
Is the plastic housing durable?
Yes, the housing is made from a high-quality, corrosion-proof plastic engineered to meet or exceed OEM specifications for durability and performance in a marine environment. It is designed to withstand heat and pressure found in marine engine cooling systems.
What is included that other kits might not have?
This is a complete repair kit that includes not only the impeller but also the pump housing, liner, plate, and all necessary gaskets for a full overhaul. Many basic kits only provide the impeller itself.
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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