Water Pump Impeller – Fits Mercury/Mariner 40-60 HP 4-Stroke Outboards (Replaces 47-19453T)

Water Pump Impeller – Fits Mercury/Mariner 40-60 HP 4-Stroke Outboards (Replaces 47-19453T)

This water pump impeller is designed for Mercury/Mariner 40, 50, and 60 HP 4-Stroke EFI outboard engines from 1999 and newer, including BigFoot models. It also fits specific Force 70 and 75 HP 2-stroke outboards from 1991-1998, depending on the engine serial number. It serves as a direct replacement for several OEM and aftermarket part numbers.

This impeller provides a reliable and cost-effective solution for maintaining your engine’s cooling system. Engineered with a key-driven shaft design and six durable rubber blades, it ensures proper water flow to prevent overheating.

• Installation Type: Direct OEM Replacement
• Material: High-Durability Rubber Compound
• Included Components: 1 x Water Pump Impeller

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 (47-19453T)

Installation Guide

1. Disconnect the battery and remove the engine cover.
2. Locate and remove the lower unit from the outboard leg.
3. Unbolt and carefully detach the water pump housing.
4. Note the rotational direction of the old impeller's blades before removing it.
5. Slide the old impeller off the drive shaft, removing the drive key.
6. Thoroughly clean the interior of the pump housing and the wear plate.
7. Install the new drive key and slide the new impeller onto the shaft.
8. While rotating the driveshaft in its normal clockwise direction, push the housing down over the impeller to correctly orient the blades.
9. Secure the water pump housing, torquing the bolts to manufacturer specifications.
10. Re-attach the lower unit to the outboard leg.
11. Reconnect the battery and test the engine with a proper water supply to verify cooling performance.

Troubleshooting & FAQ

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

A: This impeller fits Mercury/Mariner 40-60 HP 4-Stroke EFI engines made in 1999 or later, including BigFoot models. For Force outboards, it fits 70 HP and 75 HP models from specific years; you must verify that your engine's serial number falls within the ranges listed in the compatibility table.

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

A: The most common signs of a bad impeller are the engine running hotter than normal or overheating, and a weak or nonexistent stream of water from the "tell-tale" outlet port.

Q: How often should I replace my impeller?

A: For general preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1 to 2 years (or every 100-200 hours of use), especially if you operate in saltwater or water with heavy sediment.

Q: Is this an original Mercury part?

A: This is an aftermarket part, not an OEM component. It is designed to meet or exceed original equipment specifications for fit, form, and function, serving as a direct replacement for Mercury 47-19453T.

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.