6AW-44352 Water Pump Impeller for Yamaha F300 LF300 F350 LF350 FL350 | JLM Marine

Water Pump Impeller for Yamaha F300 LF300 F350 LF350 FL350 Outboard Motors

This high-quality water pump impeller is engineered to fit Yamaha 4-stroke outboard motors ranging from 300 HP to 350 HP, including F300, LF300, F350, LF350, and FL350 series engines from 2007 to 2019. It ensures reliable cooling system performance for your 5.3L Yamaha outboards.

This impeller directly replaces Yamaha OEM part numbers 6AW-44352-00, 6AW-44352-01, and 6AW-44352-03, as well as aftermarket equivalents from CEF Marine (500389), SEI West Sierra Marine (18-8925), and OBR Red Rhino (YA-113).

• Premium neoprene construction for durability and heat resistance
• 6-blade design optimized for high-horsepower applications
• Direct-fit replacement for quick installation

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 package includes:

• 1 × Water Pump Impeller (6AW-44352)

Installation Guide

1. Disconnect the battery and ensure the engine is completely cool before beginning work.
2. Remove the lower unit from the outboard motor according to your service manual.
3. Locate the water pump housing and remove the securing bolts to access the impeller.
4. Extract the old impeller carefully, noting its orientation and direction of blade curvature.
5. Inspect the pump housing for wear, scoring, or debris; clean thoroughly before proceeding.
6. Lubricate the new impeller with water pump grease or glycerin to ease installation and prevent dry-start damage.
7. Insert the new impeller into the housing, ensuring blades curve in the correct rotation direction.
8. Reinstall the pump housing cover and torque bolts to manufacturer specifications.
9. Reattach the lower unit to the outboard, aligning shift linkage and water intake ports.
10. Reconnect the battery and run the engine in a test tank or on-water to verify proper water flow.
11. Check for leaks around the pump housing and confirm steady water discharge from the tell-tale.

Troubleshooting & FAQ

How do I confirm this impeller fits my Yamaha engine?
Verify your engine model and year in the compatibility table above. Cross-check your current impeller's OEM part number (stamped on the part or listed in your service manual) against the part numbers in the cross-reference table. If your model year and part number match, this impeller will fit.

How often should I replace the water pump impeller?
Yamaha recommends inspecting the impeller annually and replacing it every 2–3 years or 200–300 hours of operation, whichever comes first. If you operate in sandy, silty, or debris-laden water, inspect and replace more frequently.

What are the signs of a failing impeller?
Common symptoms include weak or absent water flow from the tell-tale, engine overheating, steam from the powerhead, reduced performance, or an audible alarm. Inspect the impeller immediately if you notice any of these signs.

Can I install this impeller myself, or do I need a mechanic?
If you have basic mechanical skills, appropriate tools, and a service manual, you can install this impeller yourself. However, professional installation is recommended to ensure proper alignment, torque specifications, and leak-free operation.

Is this an OEM impeller or an aftermarket replacement?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.