47-85089-3 Water Pump Impeller for Mercury Mariner Chrysler Force | JLM Marine

47-85089-3 Water Pump Impeller for Mercury Mariner Chrysler Force | JLM Marine

This high-quality water pump impeller is engineered for Mercury, Mariner, Chrysler, and Force outboard engines ranging from 18 HP to 75 HP, covering both 2-stroke and 4-stroke models. Designed to maintain optimal cooling performance, this replacement impeller ensures your engine operates efficiently and reliably in demanding marine environments.

This aftermarket impeller directly replaces OEM part numbers 47-85089-3 and 47-85089-10, along with multiple cross-referenced numbers from Mercury Marine, Chrysler/Force, and aftermarket suppliers. It provides a cost-effective solution without compromising on quality or fitment.

• Package includes: 1 × Outboard Impeller
• Compatible with multiple 4-stroke models including 8 HP, 9.9 HP, 13.5 HP, 15 HP, 25 HP, 30 HP, 40 HP, 45 HP, and 50 HP engines
• Fits select Chrysler/Force models (25–75 HP) and Mercury/Mariner models (18–50 HP) with specified serial number ranges

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

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit. Ensure the engine is completely cool before beginning work.
2. Remove the water pump housing by unscrewing the mounting bolts and carefully lifting it away from the pump base. Take note of gasket orientation and condition.
3. Extract the old impeller from the housing using needle-nose pliers or a pick tool. Inspect the housing for debris, corrosion, or scoring that may damage the new impeller.
4. Lubricate the new impeller blades with a water-resistant grease or soapy water to prevent tearing during installation. Ensure lubricant reaches all blade surfaces.
5. Insert the impeller into the housing with blades oriented in the correct rotational direction (usually indicated by arrows). Gently rotate the driveshaft while pressing the impeller into place.
6. Replace the pump housing gasket and align the housing back onto the lower unit. Torque mounting bolts to manufacturer specifications in a cross-pattern.
7. Reinstall the engine cowling and reconnect the fuel line. Start the engine and verify strong water flow from the cooling outlet.
8. Run the engine briefly in a test tank or on muffs and monitor for consistent cooling discharge. Shut down immediately if no water appears within 15–20 seconds.

Troubleshooting & FAQ

How do I confirm this impeller fits my specific engine model?
Cross-reference your engine's serial number and horsepower with the compatibility table above. You can also verify your model year and exact part number using the Mercury Serial Number Guide or exploded parts diagrams linked in the Compatible Engine Models section.

How often should I replace my 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, debris-laden, or shallow water, consider annual replacement to prevent overheating damage.

What are the signs that my impeller is failing?
Common symptoms include weak or no water discharge from the cooling outlet, engine overheating warnings, steam from the cowling, or visible damage (cracked, missing, or melted blades) upon inspection. Address impeller failure immediately to avoid severe engine damage.

Can I install this impeller myself, or do I need a mechanic?
If you have basic mechanical skills and the right tools, impeller replacement is straightforward. However, proper torque specs, gasket alignment, and blade orientation are critical—professional installation is recommended if you're unfamiliar with lower-unit service.

What's the difference between this aftermarket impeller and the OEM part?
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.