Water Pump Impeller Kit – Fits Mercury/Mariner 75-115HP 4-Stroke (Replaces 817275A5, 46-817275Q05)

Water Pump Impeller Kit – Fits Mercury/Mariner 75-115HP 4-Stroke (Replaces 817275A5, 46-817275Q05)

This water pump impeller repair kit is designed for Mercury/Mariner 4-stroke outboards from 75HP to 115HP (including 1596cc, 1731cc, 1741cc, and 2.1L models) manufactured from 2004 to the present.

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

• Complete Kit: Includes all necessary components for a full water pump service: impeller, housing, face plate, gaskets, seals, and hardware.
• Durable Materials: Constructed from a robust metal alloy and neoprene rubber for reliable performance and longevity in marine environments.
• Direct Replacement: Engineered to meet or exceed OEM specifications for a precise fit and 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 (47-43026T2)
• 1 x Housing
• 1 x Face Plate
• 1 x Gasket
• 1 x Grommets
• 1 x Seal
• 1 x Cover
• 1 x Washer
• 1 x O-ring
• 1 x Impeller Key

Installation Guide

1. Safety First: Disconnect the engine's battery before starting any work.
2. Access the Lower Unit: Drain the gearcase oil and remove the lower unit from the outboard motor.
3. Remove Old Pump: Unscrew the bolts securing the water pump housing and carefully lift it off the driveshaft.
4. Inspect and Clean: Remove the old impeller, gaskets, wear plate, and key. Thoroughly clean all mating surfaces, removing any old gasket material or corrosion.
5. Install New Components: Place the new gasket and face plate onto the lower unit. Install the new impeller key into the driveshaft.
6. Install New Impeller: Slide the new impeller onto the driveshaft, turning the shaft clockwise to help seat the impeller vanes correctly within the housing.
7. Secure Housing: Apply a light coat of marine grease to the inside of the new housing, then press it down over the impeller while aligning the bolt holes. Securely tighten the bolts to the manufacturer's specified torque.
8. Reassemble: Reinstall the lower unit, refill the gearcase with fresh oil, and reconnect the battery.
9. Test Operation: Start the engine using a flush-and-test device to ensure water is pumping correctly before heading out on the water.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?

A: The best way is to check your engine's model, year, and serial number against the "Compatible Engine Models" table above. For Mercury owners, our Mercury Serial Number Guide can help you locate this information on your motor.

Q: What are the signs of a failing water pump impeller?

A: Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the "telltale" outlet, or a high temperature alarm. Visible signs on the old impeller include cracked, brittle, or missing vanes.

Q: How often should the water pump impeller be replaced?

A: As a general rule, it is recommended to inspect and replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can vary depending on usage conditions (e.g., saltwater vs. freshwater).

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.