689-44352 Water Pump Impeller for Yamaha | JLM Marine

Water Pump Impeller 689-44352 – Fits Yamaha 2-Stroke 20–30 HP Outboards

This aftermarket water pump impeller is engineered to fit a range of Yamaha 2-stroke outboard motors from 20 HP to 30 HP, covering model years from the mid-1980s through the late 1990s. It ensures reliable cooling performance across multiple Yamaha series, including standard, C-series, and CV-series engines.

Direct replacement for OEM part number 689-44352, this impeller is built to OEM specifications and provides dependable water flow for your outboard's cooling system.

• Includes impeller with key/pin for easy installation
• Designed for 2-stroke Yamaha outboards
• Fits multiple model years and HP ratings

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 Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• Outboard Rubber Impeller with Key / Pin

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit.
2. Drain the lower unit gear oil completely and remove the water pump housing bolts.
3. Carefully remove the old impeller, noting the direction of the vanes for proper reinstallation.
4. Clean the impeller housing thoroughly, removing any debris, old gasket material, or corrosion.
5. Lubricate the new impeller with water pump grease or soapy water to ease installation.
6. Insert the key/pin into the impeller slot, aligning it with the drive shaft groove.
7. Install the new impeller into the housing, ensuring vanes are oriented in the correct rotation direction.
8. Replace all gaskets and O-rings with new ones to prevent leaks.
9. Reassemble the water pump housing and torque bolts to manufacturer specifications.
10. Refill the lower unit with the correct grade and quantity of gear oil.
11. Reinstall the engine cowling and reconnect the fuel line.
12. Test the engine in water to confirm proper water flow and cooling system operation.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha outboard?
A: Cross-reference your engine's model, HP rating, stroke type, and year with the compatibility table above. Verify your OEM part number matches 689-44352, or use the Yamaha serial number guide linked in the compatibility section to identify your exact engine.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you notice overheating, reduced water flow from the tell-tale, or visible wear/cracking on the impeller vanes, replace it immediately.

Q: What are the signs of a failing impeller?
A: Common symptoms include engine overheating, weak or no water stream from the tell-tale (pee hole), steam from the engine, or an overheat alarm. Inspect the impeller if any of these occur.

Q: Can I install this impeller myself or do I need a mechanic?
A: If you have basic mechanical skills and tools, you can replace the impeller yourself by following the installation steps. However, if you're unfamiliar with outboard service or lack the proper tools, professional installation is recommended.

Q: What's the difference between OEM and aftermarket impellers?
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.