Water Pump Impeller – Fits Yamaha 6-8 HP Outboards (Replaces 6G1-44352-00-00)

Water Pump Impeller – Fits Yamaha 6-8 HP Outboards (Replaces 6G1-44352-00-00)

This water pump impeller is designed for Yamaha 6-8 HP 2-Stroke outboard motors (1984–2019). It is also compatible with certain early 5 HP models and some 8 HP high-thrust applications. Made from durable, marine-grade neoprene rubber, it ensures reliable performance for your engine’s cooling system.

This impeller is a direct replacement for Yamaha part numbers 6G1-44352-00-00, 6G1-44352-01-00, and 6G1-44352-02-00. It also cross-references with Sierra 18-3066, GLM 89870, CEF 500302, and Mallory 9-45610.

• Direct Replacement: Engineered to fit and function like the original Yamaha impeller.
• Durable Construction: Made with a reinforced metal hub and 6 neoprene rubber blades for longevity.
• Core Component: Essential for maintaining proper engine temperature and preventing overheating.

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

Package Includes:

• 1 x Impeller (Replaces 6G1-44352-00-00)

Installation Guide

1. Disconnect Power: Disconnect the battery and spark plug wires to prevent accidental starting.
2. Access the Lower Unit: Shift the outboard into neutral. Drain the gearcase oil, then unbolt and remove the lower unit from the engine's midsection.
3. Remove Water Pump Housing: Locate the water pump housing on top of the lower unit. Unscrew the bolts securing the housing and lift it off.
4. Inspect and Remove Old Impeller: Take note of the old impeller's orientation. Remove it from the drive shaft, along with any keyways, gaskets, and wear plates.
5. Clean and Prepare Surfaces: Thoroughly clean all mating surfaces, removing old gasket material and corrosion. Inspect the housing and wear plate for scoring or warping; replace if damaged.
6. Install New Impeller: Lightly lubricate the new impeller and the inside of the housing with marine grease or soapy water. Slide the new impeller onto the drive shaft, rotating the shaft clockwise to fold the blades correctly.
7. Reassemble Pump Housing: Install new gaskets and the wear plate. Carefully place the water pump housing over the new impeller, pressing down while rotating the driveshaft to seat it properly. Secure with bolts tightened to the manufacturer's torque specifications.
8. Reinstall Lower Unit: Reattach the lower unit to the midsection, ensuring the water tube and shift shaft align correctly. Refill the gearcase with fresh oil before running the engine.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha engine?
A: First, check the "Compatible Engine Models" table on this page. Next, verify your engine's model and year using our Yamaha Serial Number Guide. The surest method is to cross-reference the part number (6G1-44352-00-00) with your existing impeller or service manual.

Q: What are the signs of a failing water pump impeller?
A: Common signs include a weak or non-existent water stream from the engine's "telltale" outlet, engine overheating alerts, or an unusually high running temperature. A visual inspection of the old impeller may also reveal cracked, stiff, or broken blades.

Q: How often should I replace my outboard's impeller?
A: For preventative maintenance, we recommend replacing the impeller every 1-2 years or every 100-200 hours of use, whichever comes first. Operation in saltwater or sandy/murky water may require more frequent replacement.

Q: Is this an OEM or aftermarket part?
A: This is a high-quality aftermarket replacement part, not an OEM component. We work with an ISO9002-certified facility to ensure all parts are built to meet or exceed OEM specifications using comparable materials, with each batch 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 may be 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 you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard return window for unused items in their 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.