Complete Water Pump Repair Kit with Housing for OMC Cobra Stern Drives 2.3–7.5L (Replaces OMC 984461)
Complete Water Pump Repair Kit with Housing for OMC Cobra Stern Drives 2.3–7.5L (Replaces OMC 984461) is backordered and will ship as soon as it is back in stock.
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Complete Water Pump Repair Kit with Housing for OMC Cobra Stern Dri...
Complete Water Pump Repair Kit with Housing for OMC Cobra Stern Drives 2.3–7.5L (Replaces OMC 984461) is backordered and will ship as soon as it is back in stock.
Product Details
This complete water pump repair kit with housing is designed for OMC Cobra stern drive cooling-system applications. It is listed for OMC Cobra drives using 2.3L through 7.5L engines across the applicable model years shown below and provides the main service components needed to renew the water pump assembly.
The kit replaces OMC 984461. Catalog information identifies it as a complete water pump kit with housing and specifies an OMC Cobra application. The included impeller is associated with OMC 983895 and 777128, while the housing is associated with OMC 984744 as a component of the complete kit.
- Complete repair kit supplied with water pump housing.
- Includes the impeller, pump plate, liner, housing seal, housing gasket, and housing.
- Designed for the OMC Cobra stern drive applications listed below.
- Not intended for OMC King Cobra drives.
Part Number Matrix
Use these references to compare the complete kit and its principal service components. Component numbers should not be treated as separate complete-kit replacements.
| Brand or Component | Part Number | Reference Type |
|---|---|---|
| Sierra | 18-3348 | Complete water pump kit with housing |
| OMC | 984461 | Complete-kit replacement reference |
| OMC | 983895 / 777128 | Included impeller component references |
| OMC | 984744 | Included water pump housing component reference |
| OMC | 911703 | Included pump plate component reference |
| OMC | 911844 | Included pump liner component reference |
| OMC | 911704 | Included housing seal component reference |
| OMC | 911702 | Included housing gasket component reference |
Engine & Model Compatibility
Compatibility is based on the OMC Cobra stern drive application and the engine size and year ranges listed below. Confirm the drive designation, engine size, model year, and existing pump configuration before ordering.
| Brand | Drive Application | Engine Size | Years | Complete Kit Reference |
|---|---|---|---|---|
| OMC | Cobra stern drive | 2.3L | 1987–1990 | 984461 |
| OMC | Cobra stern drive | 2.5L | 1986 | 984461 |
| OMC | Cobra stern drive | 3.0L | 1986–1993 | 984461 |
| OMC | Cobra stern drive | 4.3L | 1986–1993 | 984461 |
| OMC | Cobra stern drive | 4.6L | 1989 | 984461 |
| OMC | Cobra stern drive | 5.0L | 1986–1993 | 984461 |
| OMC | Cobra stern drive | 5.7L | 1986–1993 | 984461 |
| OMC | Cobra stern drive | 5.8L | 1989–1993 | 984461 |
| OMC | Cobra stern drive | 7.5L | 1987–1989 | 984461 |
Technical Specs
- Product Type
- Complete water pump repair kit with housing
- Application
- OMC Cobra stern drive cooling system
- Installation
- Replacement water pump service assembly
- Complete Kit Reference
- OMC 984461
- Included Housing Reference
- OMC 984744
- Included Impeller References
- OMC 983895 / 777128
- Drive Exclusion
- Not for OMC King Cobra drives
What’s in the Box
- 1 x Water pump impeller
- 1 x Water pump plate
- 1 x Water pump liner
- 1 x Water pump housing
- 1 x Housing seal or O-ring
- 1 x Water pump housing gasket
Catalog component references identify the included parts as impeller 983895/777128, plate 911703, liner 911844, housing seal 911704, housing gasket 911702, and housing 984744.
Installation Notes
- Disconnect the battery, make sure the engine is cool, and follow the service manual procedures for accessing the OMC Cobra water pump.
- Remove the existing water pump housing, impeller, plate, liner, seals, and gasket. Note the original orientation of the impeller and related components.
- Clean all mating and sealing surfaces thoroughly. Remove old gasket material and debris without damaging the housing or gearcase surfaces.
- Install the new gasket, plate, liner, seal, impeller, and housing in the correct order and orientation for your drive.
- Apply only the lubricant or sealant specified by the manufacturer or service manual. Do not use excessive sealant on water passages.
- Tighten fasteners to the manufacturer's recommended torque specifications, reconnect hoses or passages, and complete any required cooling-system refill procedure.
- After installation, run the engine according to the service manual and check for leaks, abnormal temperature, and proper cooling-water flow.
Troubleshooting & FAQ
How can I confirm this kit fits my engine?
Confirm that your boat uses an OMC Cobra stern drive, then compare the engine size and model year with the compatibility table. Also compare the existing water pump assembly and the complete-kit reference OMC 984461 before ordering.
Does this kit fit OMC King Cobra models?
No. This kit is identified for standard OMC Cobra drives and is not specified for OMC King Cobra applications. King Cobra water pump parts use a different application and should be matched separately.
Are OMC 983895 and 984744 both complete-kit replacement numbers?
No. OMC 983895 is an impeller component reference and OMC 984744 is a water pump housing component reference. The complete-kit replacement reference listed for this assembly is OMC 984461.
What are the signs of a failing water pump impeller?
Common signs include higher-than-normal operating temperature, overheating, reduced cooling-water flow, or visible cracks, stiffness, missing vanes, or deformation when the old impeller is inspected.
How often should the water pump components be inspected?
Inspect and service the water pump according to the engine or drive manufacturer's maintenance schedule. Replacement timing depends on operating hours, storage conditions, and whether the boat is used in saltwater or freshwater.
Is this an OEM component?
This listing is for an aftermarket replacement kit. OMC part numbers are provided as application and component references only; the kit is not represented as an OMC-branded genuine part.
What should I do if the pump does not deliver proper water flow after installation?
Stop operation if the engine overheats. Recheck impeller orientation, gasket and liner placement, housing sealing surfaces, water passages, and the complete installation against the applicable service manual. Do not continue operating an engine with inadequate cooling flow.
Safety & Important Info
- Verify the drive type, engine size, model year, existing pump configuration, and reference numbers before purchase.
- This kit is for OMC Cobra applications listed above and is not for OMC King Cobra drives.
- Disconnect the battery and allow the engine to cool before service.
- Follow the manufacturer's service manual for torque values, sealants, lubrication, and cooling-system procedures.
- Professional installation is recommended when the correct drive configuration or installation procedure is uncertain.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for common marine cooling and stern-drive service applications.
- Application-Focused Listings — Product descriptions identify drive types, engine ranges, and manufacturer reference numbers where available.
- Practical Service Support — Confirm your original part and application details before installation to help ensure the correct replacement.
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