Water Pump Impeller – Fits Mercury/Mariner 30-70 HP Outboards (Replaces 47-89983T)

Water Pump Impeller – Fits Mercury/Mariner 30-70 HP Outboards (Replaces 47-89983T)

This aftermarket water pump impeller is designed for various Mercury/Mariner 30-70 HP 2-Stroke outboards manufactured between 1970 and 1989. It also serves as a replacement for Suzuki applications requiring part number 17461-95200.

Engineered to meet or exceed OEM specifications, this impeller ensures reliable cooling system performance. It directly replaces Mercury part numbers 47-89983T, 47-89983, 47-65959, and 47-20268, as well as several other aftermarket equivalents.

• Installation Method: Direct OEM replacement
• Housing Material: Durable neoprene with a brass hub
• Blades: 6

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.

For Suzuki owners, you can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

Mercury/Mariner

Suzuki

Technical Specifications

Package Contents

This package includes:

• 1 x Water Pump Impeller (Replaces Mercury 47-89983T, 47-89983, 47-65959, 47-20268)

Installation Guide

1. Disconnect the battery and shift the outboard to neutral.
2. Remove the lower unit cowling by unbolting it from the midsection.
3. Locate the water pump housing, usually situated on top of the lower unit.
4. Remove the bolts securing the water pump housing cover.
5. Carefully lift the housing to expose the old impeller. Note its rotational direction.
6. Slide the old impeller off the driveshaft, removing the Woodruff key if present.
7. Clean the housing interior and inspect it for scoring or damage.
8. Lightly lubricate the new impeller and housing interior with marine grease.
9. Install the Woodruff key and slide the new impeller onto the shaft, turning it in the correct rotational direction to bed the vanes.
10. Reinstall the water pump housing, gaskets, and cover, tightening bolts to the manufacturer's specified torque.
11. Reattach the lower unit to the midsection and reconnect the battery.
12. Test the engine using a water source (flusher or test tank) to confirm proper water flow.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: The best method is to compare your engine's model, horsepower, and serial number range against the compatibility table provided. For Mercury/Mariner engines, the serial number is the most accurate way to ensure a match. If you are unsure, visually compare your old impeller to our product images and specifications.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating at idle or low speeds, a weak or inconsistent stream of water from the "telltale" outlet, and visible cracking or damage to the impeller blades during inspection. The engine's temperature alarm may also activate.

Q: How often should I replace my impeller?
A: For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years, depending on usage hours and operating conditions (e.g., saltwater vs. freshwater). An impeller that has been stored for a long winter season may develop stiff or cracked blades and should be replaced before the start of the next season.

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.