Water Pump Impeller Kit – Fits Johnson/Evinrude/OMC (Replaces 3854661, 987253, 987743)

Water Pump Impeller Kit – Fits Johnson/Evinrude/OMC (Replaces 3854661, 987253, 987743)

This water pump impeller kit is designed for a range of Johnson, Evinrude, and OMC stern drive engines from 1992–1993, including 3.2L, 5.7L, 5.8L, 7.4L, and 8.2L models. It provides a reliable solution for maintaining your engine's cooling system for optimal performance.

This assembly is a direct replacement for OMC part numbers 3854661, 987743, and 987253. Please verify your specific engine model and part number before ordering.

• Installation Type: Direct replacement for a straightforward fit.
• Complete Kit: Includes the impeller, housing, plate, liner, seal, and gasket.
• Application: Specifically for OMC King Cobra stern drive models.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers. This kit replaces a series of superseded parts.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Plate (0915216)
• 1 x Liner (0763983)
• 1 x Seal (3853473)
• 1 x Gasket (3853654)
• 1 x Housing and Fitting Assembly (3854071)
• 1 x Impeller (3854072)

Installation Guide

1. Safety First: Disconnect the battery cables and ensure the engine is completely cool before starting work.
2. Access the Pump: Locate and remove the lower unit (gearcase) to access the water pump assembly. Keep track of all mounting bolts.
3. Disassemble: Carefully unbolt and remove the existing water pump housing. Note the orientation of the old impeller vanes.
4. Remove Old Components: Take out the old impeller, wear plate, gaskets, and seals. Clean any debris or corrosion from the mounting surfaces.
5. Install New Kit: Place the new gasket and wear plate onto the gearcase. Lightly grease the interior of the new housing and the impeller.
6. Seat the Impeller: Slide the new impeller onto the driveshaft. Turn the driveshaft clockwise while pushing down to correctly seat the vanes inside the housing liner.
7. Reassemble Housing: Install the new housing and tighten the bolts to the manufacturer's specified torque. Do not overtighten.
8. Reinstall Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube are properly aligned. Secure it with the mounting bolts.
9. Final Check: Reconnect the battery. Start the engine using a water source (flushing attachment or in the water) and confirm a steady stream of water is exiting the tell-tale port.

Troubleshooting & FAQ

How can I be sure this kit fits my OMC stern drive?
This kit is designed for specific 3.2L, 5.7L, 5.8L, 7.4L, and 8.2L models from 1992–1993. Please check your engine model against the "Compatible Engine Models" table and verify that your existing part matches OEM part number 3854661.

What are the signs my water pump impeller needs replacement?
The most common signs of a failing impeller are the engine overheating at idle or low speeds, and a weak or nonexistent water stream from the tell-tale outlet. Visual inspection may also reveal cracked, brittle, or missing vanes on the old impeller.

Does this kit include the housing?
Yes, this is a comprehensive kit that includes the water pump housing and fitting assembly, along with the impeller, plate, liner, gaskets, and seals needed for a complete overhaul.

How often should I replace my water pump impeller?
As a critical part of preventative maintenance, we recommend inspecting the impeller annually and replacing it every 1-2 years or 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.