Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces 6G1-44352-00)

Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces 6G1-44352-00)

This water pump impeller is a direct-fit replacement for select Yamaha and Mercury/Mariner 2-stroke outboard models. It is essential for maintaining proper engine cooling by circulating water through the cooling system, preventing overheating and potential engine damage.

Designed to meet or exceed OEM specifications, this impeller is made from durable neoprene rubber for reliable performance in marine environments. It directly replaces Yamaha part numbers 6G1-44352-00-00, 6G1-44352-01, 6G1-44352-02 and Mercury part number 47-11590M.

• Compatible with Yamaha 6HP & 8HP (1984–2009) and Mercury/Mariner 6C, 6D, & 8C models.
• Constructed from high-quality, durable neoprene rubber with 6 blades.
• Package includes one water pump impeller.

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.

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

Yamaha 2-Stroke Compatibility

Mercury/Mariner Compatibility

Technical Specifications

Package Contents

This package includes the following item:

• 1 x Water Pump Impeller (6G1-44352-00-00)

Installation Guide

Follow these steps for a successful installation:

1. Disconnect the battery and remove the lower unit from the outboard motor.
2. Unbolt and carefully lift the water pump housing to expose the old impeller.
3. Take note of the blade orientation before removing the old impeller from the driveshaft.
4. Thoroughly clean the inside of the pump housing and inspect it for any scoring or damage.
5. Lightly coat the new impeller and the inside of the housing with marine grease.
6. Slide the new impeller onto the driveshaft, twisting it in the direction of engine rotation to bend the blades correctly.
7. Reinstall the water pump housing, ensuring a proper seal, and tighten the bolts to the manufacturer's torque specifications.
8. Reattach the lower unit, reconnect the battery, and test the engine's cooling system in water.

Troubleshooting & FAQ

Q: How do I know if this impeller fits my outboard?
A: Check your engine's model and year against the compatibility tables above. The surest way to confirm fitment is to match your existing part number to those listed in our cross-reference table. You can also use the Yamaha and Mercury serial number guides linked above to identify your exact model.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "tell-tale" outlet, or finding the old impeller's blades are dry, cracked, brittle, or have taken a permanent set.

Q: How often should I replace my water pump impeller?
A: As part of preventative maintenance, we recommend replacing the impeller every one to two years, or every 100-200 hours of use. More frequent replacement may be necessary if you operate in saltwater or water with high levels of sand or silt.

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.