47-F523065-1;47-803630T Water Pump Impeller for Mercury Mariner Chrysler Force | JLM Marine

Water Pump Impeller for Mercury Mariner Chrysler Force 85–125 HP Outboards

This premium aftermarket water pump impeller is engineered to fit Mercury Mariner 2-stroke 85 HP and 125 HP outboards, as well as Chrysler Force 75–140 HP models. Designed to meet OEM specifications, it ensures reliable cooling system performance across a wide range of vintage and modern outboard engines from 1977 to 1989.

This impeller directly replaces Mercury 47-803630T, Chrysler Force 47-F523065-1, Sierra 18-3030, and Mallory 9-45001. Built with a neoprene construction and brass hub, it delivers durability and corrosion resistance for freshwater and saltwater applications.

• 6-blade neoprene impeller with brass hub for superior longevity
• Compatible with Mercury Mariner, Chrysler Force outboards from 75 HP to 140 HP
• Lubricate with silicone grease, glycerine, or dish soap during installation (lubricant not included)

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 Impeller (Neoprene)

Installation Guide

1. Disconnect the battery and turn off the fuel supply before beginning any work.
2. Remove the lower unit or water pump housing to access the impeller chamber.
3. Carefully extract the old impeller, noting the direction of the blade rotation.
4. Inspect the impeller housing and shaft for wear, corrosion, or debris; clean thoroughly.
5. Lubricate the new impeller generously with silicone grease, glycerine, or dish soap (lubricant not included).
6. Install the new impeller into the housing, ensuring blades are oriented in the correct rotational direction.
7. Gently rotate the drive shaft by hand to confirm smooth engagement and proper blade flex.
8. Reassemble the water pump housing or lower unit, torquing all fasteners to manufacturer specifications.
9. Reconnect the battery and restore the fuel supply.
10. Start the engine in a test tank or on-water and verify strong water flow from the telltale outlet.
11. Monitor engine temperature for the first few minutes to confirm cooling system operation.
12. If no water flow is observed, shut down immediately and recheck impeller installation and housing alignment.

Troubleshooting & FAQ

How do I confirm this impeller fits my engine?
Cross-reference your outboard's horsepower, model year, and serial number with the Compatible Engine Models table above. You can also use the Mercury Serial Number Guide or consult your owner's manual to verify OEM part number 47-803630T or 47-F523065-1.

How often should I replace the water pump impeller?
Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you frequently run in sandy or debris-laden water, inspect and replace more often.

What are the signs of a failing impeller?
Common symptoms include overheating, weak or absent telltale water stream, steam from the engine, and high-temperature alarms. If you observe any of these, shut down immediately and inspect the impeller and cooling passages.

Can I install this impeller without special tools?
Basic hand tools (screwdrivers, wrenches, pliers) are sufficient for most installations. However, some lower units require a seal driver or bearing puller; consult your service manual for model-specific requirements.

What type of lubricant should I use during installation?
Use silicone grease, glycerine, or dish soap to ease installation and prevent blade damage. Avoid petroleum-based lubricants, as they can degrade the neoprene material over time.

Is this an OEM part or aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.