47-19453T Outboard Impeller for Mercury Mariner 40HP 50HP 60HP | JLM Marine

47-19453T Outboard Impeller for Mercury Mariner 40HP 50HP 60HP | JLM Marine

This high-quality aftermarket impeller is engineered to fit Mercury Mariner 4-stroke outboard engines ranging from 40HP to 60HP, including both carbureted and EFI models across 3-cylinder and 4-cylinder configurations. Designed for reliable cooling system performance, this replacement ensures your engine operates at optimal temperatures during every outing.

Direct OEM Replacement: 47-19453T

• Fits Mercury Mariner 4-stroke 40HP, 50HP, and 60HP engines (3-cylinder and 4-cylinder)
• Compatible with both carbureted and EFI fuel systems
• Essential component for maintaining proper engine cooling

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

Your order includes:

• 1 × Outboard Impeller

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit. Tilt the engine fully up and secure it in place.
2. Drain the gear oil from the lower unit by removing the drain and vent screws. Disconnect the water intake hose if necessary.
3. Remove the lower unit by loosening the mounting bolts that secure it to the mid-section. Carefully slide the lower unit away from the drive shaft.
4. Access the water pump housing by removing the bolts that hold the pump cover in place. Take note of the orientation of components for reassembly.
5. Remove the old impeller carefully, inspecting the housing and plate for wear, corrosion, or damage. Clean all surfaces thoroughly.
6. Lubricate the new impeller blades with a water-resistant marine grease or glycerin to ease installation and prevent tearing during initial startup.
7. Install the new impeller into the housing, ensuring the blades are oriented in the correct rotation direction (check your service manual). Use a twisting motion to seat it fully.
8. Reassemble the water pump housing by replacing the pump plate, cover, and gaskets in reverse order. Torque all bolts to manufacturer specifications.
9. Reattach the lower unit to the mid-section, aligning the drive shaft and water tube carefully. Secure all mounting bolts and reconnect the water intake hose.
10. Refill the lower unit with fresh gear oil through the lower drain hole until it flows from the upper vent hole. Replace both screws securely.
11. Reinstall the engine cowling and reconnect the fuel line. Run the engine in a test tank or on muffs to verify proper water flow from the tell-tale outlet.
12. Check for leaks around the water pump housing and lower unit seals. Monitor engine temperature during the first few outings to confirm cooling system performance.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Mercury Mariner engine?
A: Cross-reference your engine model with the compatibility table above. Check your original impeller or service manual for part number 47-19453T, and use the Mercury Serial Number Guide linked in the compatibility section to identify your exact engine model and year.

Q: How often should I replace my outboard impeller?
A: Most manufacturers recommend replacing your impeller annually or every 200–300 hours of operation, whichever comes first. If you frequently run in sandy or debris-filled water, inspect it more often and replace at the first sign of cracking, missing blades, or reduced flexibility.

Q: What are the signs that my impeller is failing?
A: Common symptoms include weak or no water flow from the tell-tale (pee hole), engine overheating, steam from the cowling, or reduced performance. If you notice any of these, shut down immediately and inspect the impeller and cooling system.

Q: Can I use this impeller in both carbureted and EFI models?
A: Yes, this impeller is designed to fit Mercury Mariner 4-stroke engines in both carbureted and EFI configurations across the 40HP, 50HP, and 60HP range, as listed in the compatibility table.

Q: Is this an OEM or aftermarket impeller?
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.