Water Pump Impeller – Fits Yamaha 8-20 HP Outboard Motors (Replaces 63V-44352-01-00)

Water Pump Impeller – Fits Yamaha 8-20 HP Outboard Motors (Replaces 63V-44352-01-00)

This water pump impeller is designed for a range of Yamaha and Honda outboard motors. It is compatible with Yamaha 8-15 HP 2-Stroke and 4-Stroke models (1984–2023) and Honda 8-20 HP 4-Stroke outboard motors (BF8, BF10, BF15, and BF20 series).

This part serves as a direct replacement for Yamaha part numbers 63V-44352-01-00 and 63V-44352-00, Sierra 18-3040, and Honda 19210-ZW9-A32 / 19210-ZW9-A31.

• Installation: Direct replacement for a hassle-free fit.
• Material: Constructed from wear-resistant, high-quality ABS rubber for durability.
• Function: Efficiently pumps cooling water through the engine during operation.

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.

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (63V-44352-01-00)

Explosion Diagram

Installation Guide

1. Disconnect the negative battery cable and remove the engine cover.
2. Locate and unbolt the lower unit (gearcase) from the outboard motor's driveshaft housing.
3. Carefully separate the lower unit to gain access to the water pump assembly.
4. Remove the bolts securing the water pump housing cover. Keep track of bolt lengths if they differ.
5. Note the rotational direction of the old impeller's fins before sliding it off the driveshaft.
6. Remove the old impeller, gasket, and wear plate from the housing.
7. Thoroughly clean the housing interior and inspect it for any deep grooves, cracks, or corrosion.
8. Install the new wear plate and gasket, followed by the new impeller. Lightly grease the housing interior and turn the driveshaft clockwise to help fold the vanes correctly as you seat the impeller.
9. Reinstall the water pump housing cover and tighten the bolts to the manufacturer's specified torque.
10. Apply a light coat of marine grease to the driveshaft splines and reinstall the lower unit.
11. Reconnect the battery, start the engine in a water source, and verify a strong, steady stream from the cooling system's telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my specific engine model?

A: First, check the "Compatible Engine Models" and "Part Number Cross-Reference" tables on this page to see if your model is listed. For Yamaha engines, we provide a Serial Number Guide to help verify your model and year. The most reliable method is to compare the dimensions and product images to your old part before ordering.

Q: What are the signs that my water pump impeller needs to be replaced?

A: Common indicators of a failing impeller include the engine overheating, an engine alarm sounding, or a weak, inconsistent water stream from the "telltale" outlet. Visual inspection may reveal cracked, brittle, or heavily worn-out impeller vanes.

Q: How often should I replace my water pump impeller?

A: As a crucial part of preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years. Replacement frequency depends on operating hours and conditions (saltwater use may require more frequent changes than freshwater).

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.