983895;777128 Water Pump Impeller for OMC BRP Cobra | JLM Marine

Water Pump Impeller for OMC BRP Cobra V6 V8 Stern Drive – Fits 2.3L to 7.5L Engines (1986-1993)

This high-quality aftermarket water pump impeller is engineered to fit OMC BRP Cobra V6 and V8 stern drive engines ranging from 2.3L to 7.5L displacement, covering model years 1986 through 1993. Designed to maintain optimal cooling performance, this impeller ensures reliable water flow through your boat's cooling system, protecting your engine from overheating during operation.

This impeller directly replaces OEM part numbers 983895 and 777128, providing a cost-effective solution for routine maintenance or emergency repairs. Manufactured to OEM specifications, it delivers dependable performance for a wide range of OMC Cobra stern drive applications.

• Fits OMC BRP Cobra stern drives with 2.3L, 2.5L, 3.0L, 4.3L, 4.6L, 5.0L, 5.7L, 5.8L, and 7.5L engines
• Direct replacement for OEM part numbers 983895 and 777128
• Essential component for maintaining proper engine cooling and preventing overheating

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 × Outboard Impeller

Installation Guide

1. Disconnect the battery and ensure the engine is off and cool before beginning any work.
2. Locate the water pump housing on your OMC Cobra stern drive unit. You may need to remove the lower unit for access.
3. Remove the pump cover by unscrewing the retaining bolts or fasteners securing it in place.
4. Extract the old impeller carefully using pliers or an impeller puller tool. Inspect the housing for wear, debris, or damage.
5. Clean the impeller housing thoroughly, removing any old gasket material, corrosion, or debris.
6. Lubricate the new impeller blades with marine-grade grease or glycerin to ease installation and prevent blade damage.
7. Install the new impeller by rotating the blades in the correct direction (usually counterclockwise when viewed from the top) as you press it into the housing.
8. Ensure all blades are properly seated and positioned correctly within the pump chamber.
9. Replace the gasket or O-ring if included or if the old one shows signs of wear.
10. Reinstall the pump cover and torque the bolts to the manufacturer's specifications in a crisscross pattern.
11. Reassemble the lower unit (if removed) and reconnect all components following your service manual.
12. Test the cooling system by running the engine with a water supply and checking for proper water discharge and temperature.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my OMC Cobra stern drive?
A: Check the compatibility table above to verify your engine displacement (2.3L to 7.5L) and model year (1986-1993). You can also cross-reference your current impeller or pump housing with OEM part numbers 983895 or 777128 to ensure a proper match.

Q: How often should I replace my water pump impeller?
A: Most marine technicians recommend replacing the impeller every 2-3 years or 200-300 hours of operation, whichever comes first. If you notice overheating, reduced water flow from the tell-tale, or visible cracks and missing blades, replace it immediately.

Q: What are the signs that my impeller is failing?
A: Common symptoms include engine overheating, weak or no water stream from the cooling tell-tale outlet, steam from the engine compartment, and unusual temperature gauge readings. Inspect the impeller if you experience any of these issues.

Q: Can I install this impeller myself, or do I need a professional?
A: If you have basic mechanical skills and the proper tools, you can replace the impeller yourself by following the installation guide. However, if you're unfamiliar with stern drive service or lack confidence, professional installation is recommended to ensure proper function and avoid damage.

Q: Is this an OEM or aftermarket impeller?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.