47-19453T Outboard Rubber Impeller with Key/Pin for Mercury Mariner 4-Stroke 40HP 50HP 60HP | JLM Marine

47-19453T Outboard Rubber Impeller with Key/Pin for Mercury Mariner 4-Stroke 40HP 50HP 60HP | JLM Marine

This high-quality rubber impeller is designed to fit Mercury Mariner 4-stroke outboard engines ranging from 40HP to 60HP. Engineered for reliable cooling performance, this impeller ensures your engine operates at optimal temperatures across a wide range of applications including 3-cylinder and 4-cylinder configurations, both carbureted and EFI models.

This aftermarket impeller directly replaces OEM part number 47-19453T, providing a cost-effective solution without compromising performance. Compatible with multiple Mercury Mariner 4-stroke series, this impeller is built to meet OEM specifications for dependable service.

• Complete kit includes impeller, key, and pin for easy installation
• Compatible with both carbureted and EFI 4-stroke engines
• Fits 3-cylinder and 4-cylinder Mercury Mariner models from 40HP to 60HP

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 × Outboard Rubber Impeller
• 1 × Key/Pin

Installation Guide

1. Disconnect the battery and remove the lower unit from the engine following your manufacturer's service manual.
2. Locate and remove the water pump housing cover by unscrewing the retaining bolts.
3. Carefully remove the old impeller from the pump housing. Note the direction of the impeller blades for proper installation.
4. Inspect the pump housing and plate for wear, corrosion, or damage; replace if necessary.
5. Lubricate the new impeller with glycerin or soapy water (never use petroleum-based lubricants). Do not use grease.
6. Insert the key/pin into the impeller shaft slot according to the orientation marked on your pump.
7. Install the new impeller into the housing, ensuring the blades face the correct rotation direction. Gently rotate to seat it fully.
8. Reinstall the pump housing cover and secure all bolts to the manufacturer's torque specifications.
9. Reattach the lower unit to the engine, ensuring all seals and gaskets are in good condition.
10. Reconnect the battery and run the engine with water supply (using a test tank or flushing muffs) to verify proper water flow.
11. Check for leaks around the pump housing and ensure a steady stream from the tell-tale (pee hole).
12. If water flow is weak or absent, shut down immediately and recheck the installation.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Mercury Mariner engine?
A: Cross-reference your engine model and horsepower with the compatibility table above. You can also verify your engine's serial number using the Mercury Serial Number Guide linked in the Compatible Engine Models section, or check the exploded parts diagrams to confirm part number 47-19453T matches your water pump assembly.

Q: How often should I replace my outboard impeller?
A: Most manufacturers recommend replacing the impeller annually or every 200–300 operating hours, whichever comes first. If you notice overheating, reduced water flow from the tell-tale, or visible cracks and missing blades during inspection, replace the impeller immediately regardless of usage time.

Q: What are the signs of a failing impeller?
A: Common symptoms include engine overheating, weak or no water discharge from the tell-tale hole, steam from the engine, or an abnormal high-temperature warning. Inspect your impeller if you experience any of these issues.

Q: Can I use grease to lubricate the impeller during installation?
A: No, never use petroleum-based grease as it can damage the rubber. Use glycerin, soapy water, or a water-based lubricant specifically designed for impeller installation to protect the rubber and ensure smooth insertion.

Q: What's the difference between this aftermarket impeller and the OEM part?
A: This aftermarket impeller is manufactured to OEM specifications using comparable-grade rubber compounds. It offers the same fit, form, and function as the original Mercury part 47-19453T but at a more competitive price point, making it a cost-effective replacement without sacrificing reliability.

Q: Is this an OEM part or an aftermarket replacement?
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.