689-44352 Water Pump Impeller for Yamaha | JLM Marine

Water Pump Impeller for Yamaha 2-Stroke 20–30 HP Outboards

This aftermarket water pump impeller is engineered for Yamaha 2-stroke outboard motors ranging from 20 HP to 30 HP across multiple production years. It provides reliable cooling system performance for engines manufactured between 1984 and 1998, covering standard, C-series, and CV-series models.

Direct Replacements: 689-44352, 689-44352-03, 47-84797M.

• Designed for Yamaha 2-stroke outboards from 20 to 30 horsepower
• Fits standard, C-series (C25, C30), and CV-series (CV25, CV30) engine variants
• Ensures proper water circulation for 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 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

• 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 cooled before starting work.
2. Remove the lower unit by unscrewing the mounting bolts and gently separating it from the mid-section. Support the unit carefully to avoid damage.
3. Locate the water pump housing on the lower unit. Remove the bolts securing the pump cover and lift it off.
4. Extract the old impeller from the pump housing using needle-nose pliers if necessary. Inspect the housing for debris or damage.
5. Clean the pump housing thoroughly with a mild solvent and wipe dry. Check the wear plate and replace if scored or damaged.
6. Lubricate the new impeller with marine-grade grease or soapy water to ease installation and prevent dry-start damage.
7. Insert the new impeller into the housing, ensuring all blades curve in the correct rotational direction. Align the keyway with the driveshaft.
8. Reinstall the pump cover and gasket, torquing bolts to manufacturer specifications in a crisscross pattern. Do not overtighten.
9. Reattach the lower unit to the mid-section, aligning the driveshaft splines carefully. Secure all mounting bolts evenly.
10. Reconnect the fuel line and replace the engine cowling. Check that all fasteners are tight.
11. Run the engine in a test tank or on-the-water to verify proper water flow from the tell-tale outlet. Monitor for overheating during the first few minutes.
12. Inspect for leaks around the pump housing and lower unit seals. Address any issues immediately before regular use.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my specific Yamaha engine?
A: Cross-reference your engine's model, horsepower, and production year with the compatibility table above. You can also verify the OEM part number (689-44352, 689-44352-03, or 47-84797M) in your engine's service manual or parts diagram.

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. Inspect it annually for cracks, missing blades, or hardening, especially if the engine has been run dry or in sandy/silty water.

Q: What are the signs that my impeller is failing?
A: Common symptoms include weak or absent water flow from the tell-tale outlet, engine overheating, steam from the exhaust, or a high-temperature alarm. If you notice any of these, stop the engine immediately and inspect the impeller.

Q: Can I install this impeller myself, or do I need a professional?
A: If you have basic mechanical skills and the proper tools, you can install it yourself following the guide above. However, if you're unfamiliar with lower unit disassembly or torque specifications, professional installation is recommended to avoid leaks or damage.

Q: Is this an OEM impeller or an aftermarket replacement?
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.