Mercury Water Pump Impeller Kit – Fits Mercury/Mariner 75-115HP EFI, 150HP EFI

Mercury Water Pump Impeller Kit – Fits Mercury/Mariner 75-115HP EFI, 150HP EFI (Replaces 47-43026Q06, 8M0094529)

This water pump impeller kit is designed for Mercury/Mariner 75-115HP 4-Stroke EFI outboards (2000–present). It also fits select 150HP EFI 4-Stroke models (excluding Verado).

This kit serves as a direct replacement for Mercury part numbers 47-43026Q06, 8M0094529, and Sierra 18-3265.

• Engineered for durability and optimal water flow to prevent overheating.
• Includes a new impeller, gaskets, and plate for a complete service.
• Direct OEM replacement design for straightforward installation.

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. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (47-43026Q06)
• 1 x Impeller Plate
• 1 x Water Pump Base Gasket
• 1 x Water Pump Upper Gasket
• 1 x Water Pump Gasket

Installation Guide

1. Safety First: Disconnect the battery and ensure the engine is off and cool.
2. Drain Gear Lube: Place a drain pan under the lower unit and remove the upper and lower drain screws to drain the gear lube.
3. Remove Lower Unit: Remove the propeller, then unbolt the lower unit (gearcase) from the outboard's midsection and carefully lower it.
4. Access Impeller: Unscrew the bolts securing the water pump housing cover to access the impeller. Note the orientation of the old impeller's fins.
5. Remove Old Components: Remove the old impeller, wear plate, and gaskets. Be sure to remove the small impeller key from the driveshaft.
6. Clean Surfaces: Thoroughly clean all mating surfaces, removing any old gasket material or sealant residue.
7. Install New Kit: Place the new gaskets and wear plate, slide the new impeller key into the driveshaft, and install the new impeller by turning the driveshaft clockwise to seat the fins correctly.
8. Reassemble Pump: Reinstall the water pump housing, ensuring a proper seal. Tighten bolts to the manufacturer's specified torque.
9. Reinstall Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft and water tube align correctly. Reinstall and tighten all bolts.
10. Final Steps: Reinstall the propeller, then refill the lower unit with fresh gear lube until it emerges from the upper vent hole. Reinstall both drain/vent screws with new gaskets.
11. Test Operation: Reconnect the battery, start the engine in a water supply (using flushing muffs or in the water), and verify a strong, steady stream from the telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller kit fits my specific engine?
A: The best way to ensure fitment is to cross-reference your engine's model, year, and serial number against the 'Compatible Engine Models' table on this page. For Mercury owners, our Mercury Serial Number Guide can help you locate this information on your engine.

Q: What are the common signs of a failing water pump impeller?
A: Key symptoms include your engine overheating, especially at idle or low speeds, and a weak or no water stream from the telltale (pee hole) outlet. Upon inspection, a worn impeller may have cracked, brittle, or completely broken fins.

Q: How often should the impeller be replaced?
A: As a crucial part of preventative maintenance, it is recommended to inspect the impeller annually. We suggest replacing it every 1-2 years or every 100-200 hours of operation, whichever comes first, especially if you operate in saltwater or silty conditions.

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.