662-44352-01 Water Pump Impeller for Yamaha Mariner 8A 8B 15A | JLM Marine

662-44352-01 Water Pump Impeller for Yamaha Mariner 8A 8B 15A

This high-quality aftermarket water pump impeller is engineered to fit Yamaha Mariner 8HP and 15HP 2-stroke outboard motors, including 8A(M), 8A(ML), 8B(M), 8B(ML), 15A(M), and 15A(ML) models. Designed to meet OEM specifications, this impeller ensures reliable cooling system performance for your outboard engine.

This impeller directly replaces Yamaha Marine OEM part numbers 662-44352-01 and 662-44352-00, as well as aftermarket equivalents from Sierra Marine, CEF Marine, Mallory Marine, and GLM Marine. It provides a cost-effective solution without compromising on quality or fitment.

• 6-blade impeller design for optimal water flow and cooling efficiency
• Precision-manufactured to OEM dimensions and tolerances
• Compatible with Yamaha Mariner 8HP and 15HP 2-stroke outboards

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

Your purchase includes:

• 1 × Water Pump Impeller

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit. Ensure the engine is cool before beginning work.
2. Drain the lower unit gear oil by removing the drain and vent screws. Position a container underneath to catch the oil.
3. Remove the water pump housing by loosening the mounting bolts that secure it to the lower unit. Keep track of all hardware for reassembly.
4. Carefully extract the old impeller from the pump housing, noting the direction of the blade rotation. Inspect the housing for wear or damage.
5. Clean the pump housing thoroughly, removing any debris, old gasket material, or corrosion. A clean surface ensures proper sealing.
6. Lubricate the new impeller blades with glycerin, dish soap, or water pump grease to ease installation and prevent tearing.
7. Install the new impeller into the housing, ensuring the blades are oriented in the correct rotational direction. Gently compress the blades as you slide it into place.
8. Replace all gaskets and O-rings with new components to prevent leaks. Never reuse old gaskets.
9. Reassemble the water pump housing onto the lower unit, torquing all bolts to manufacturer specifications in a crisscross pattern.
10. Refill the lower unit with fresh gear oil through the drain hole until oil appears at the vent hole, then install both screws.
11. Reinstall the engine cowling and reconnect the fuel line. Double-check all connections before starting the engine.
12. Start the engine in a test tank or on the water and verify strong water stream from the telltale hole, confirming proper impeller function.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha Mariner engine?
A: Cross-reference your engine model and serial number with the Compatible Engine Models table above. Verify that your engine falls within the listed serial ranges for 8A(M), 8A(ML), 8B(M), 8B(ML), 15A(M), or 15A(ML) models. You can also check your engine's parts diagram using the Yamaha resources linked above.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or every 200–300 hours of operation, whichever comes first. If you frequently operate in sandy or debris-filled water, consider more frequent replacement to prevent cooling system failure.

Q: What are the signs that my impeller needs replacement?
A: Common warning signs include weak or absent water stream from the telltale hole, engine overheating, steam from the engine, or reduced water pressure. If you notice any of these symptoms, inspect and replace the impeller immediately to prevent engine damage.

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 this impeller following the guide above. However, if you're unfamiliar with lower unit disassembly or lack experience with outboard maintenance, professional installation is recommended to ensure proper fitment and avoid damage.

Q: What's the difference between this aftermarket impeller and the OEM version?
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.