Water Pump Impeller Kit – Fits OMC Cobra Gearcase Assemblies (Replaces 984461, 777128, 983895)

Water Pump Impeller Kit – Fits OMC Cobra Gearcase Assemblies (Replaces 984461, 777128, 983895)

This water pump impeller repair kit is designed for OMC Cobra sterndrive gearcase assemblies from 1986–1993. It is compatible with a wide range of engine models, including 2.3L, 3.0L, 4.3L, 5.0L, 5.7L, and 5.8L engines.

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring comprehensive compatibility for routine maintenance or repair.

• Fits OMC Cobra sterndrive lower gearcase assemblies.
• Does not include the water pump housing (for a kit with housing, see part number OMC 984744).
• Installation requires Johnson/Evinrude gasket seating compound (not included).

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 x Impeller (Replaces OMC 983895/777128)
• 1 x O-ring (Replaces OMC 911704)
• 1 x Liner (Replaces OMC 911844)
• 1 x Wear Plate (Replaces OMC 911703)
• 1 x Gasket (Replaces OMC 911702)

Installation Guide

Follow your sterndrive's service manual for detailed instructions. The general steps are outlined below:

1. Disconnect the battery and shift the drive into forward gear.
2. Remove the lower unit (gearcase) from the upper drive housing.
3. Locate and unbolt the water pump housing.
4. Remove the old impeller, wear plate, liner, gasket, and O-rings. Clean all mating surfaces thoroughly.
5. Lightly lubricate the new impeller with soapy water or a suitable marine lubricant.
6. Apply a thin coat of Johnson/Evinrude gasket seating compound to both sides of the new gasket.
7. Install the new wear plate, gasket, and liner into the housing.
8. Install the new impeller, ensuring the vanes are oriented correctly (turn the driveshaft clockwise).
9. Secure the water pump housing with the bolts, tightening to the manufacturer's specified torque.
10. Reinstall the lower unit to the upper housing, ensuring the water tube and shift shaft are properly aligned.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my OMC Cobra sterndrive?
A: This kit is designed for OMC Cobra models made between 1986 and 1993. The best way to ensure fitment is to check the part number stamped on your existing components and compare it against the numbers listed in our cross-reference table (OMC 984461, 777128, 983895). You can also verify compatibility using the engine model table provided.

Q: What is the difference between this impeller kit (984461) and a kit that includes the housing?
A: This kit contains the essential service components: the impeller, wear plate, liner, gasket, and O-ring. It assumes your existing water pump housing is in good, reusable condition. If your housing is cracked, scored, or warped from heat, you will need the complete kit that includes a new housing (see part number OMC 984744).

Q: How often should I replace my water pump impeller?
A: For preventative maintenance, it's recommended to inspect the impeller annually and replace it every 1-2 years, depending on operating hours and water conditions (e.g., saltwater, silty water). A common sign of a failing impeller is the engine overheating at idle or low speeds.

Q: OEM vs. Aftermarket?
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.