Water Pump Impeller – Fits Yamaha 100-250 HP Outboards (Replaces 6E5-44352-01-00)

Water Pump Impeller – Fits Yamaha 100-250 HP Outboards (Replaces 6E5-44352-01-00)

This water pump impeller is designed for a wide range of Yamaha 4-Stroke outboards from 100 to 250 HP. It is compatible with F100, F115, F150, F175, F200, F225, and F250 series engines, providing reliable performance for maintaining your engine's cooling system.

This component serves as a direct replacement for Yamaha part number 6E5-44352-01-00 and Sierra aftermarket part number 18-3071, ensuring a precise fit and function.

• Installation: Direct replacement for a hassle-free fit.
• Material: Constructed from durable neoprene rubber for reliable performance.
• Package Includes: 1 x 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.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (6E5-44352-01-00)

Installation Guide

1. Safety First: Disconnect the engine's battery cables before beginning work.
2. Access the Lower Unit: Shift the outboard into neutral. Remove the bolts securing the lower unit (gearcase) to the engine's midsection and carefully lower it.
3. Open the Water Pump: Locate the water pump housing on top of the gearcase. Unscrew the bolts to remove the housing cover.
4. Remove Old Impeller: Slide the old impeller off the driveshaft. You may need to remove a key or pin first. Note the direction the vanes are bent.
5. Clean and Inspect: Thoroughly clean the inside of the pump housing and the base plate. Inspect for scoring, warping, or corrosion and replace if damaged.
6. Install New Impeller: Lightly lubricate the new impeller with a marine-safe lubricant. Slide it onto the driveshaft while turning the shaft clockwise to correctly fold the vanes.
7. Reassemble: Reinstall the housing cover, ensuring all gaskets and seals are correctly seated. Torque the bolts to the manufacturer's specifications.
8. Reinstall Lower Unit: Guide the lower unit back into position, ensuring the driveshaft, shift shaft, and water tube are properly aligned. Secure it with the mounting bolts.
9. Test Operation: Reconnect the battery. Start the engine using a water supply (flushing muffs) and confirm a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

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

A: Start by checking the "Compatible Engine Models" table on this page. For Yamaha owners, we highly recommend using the official Yamaha Serial Number Guide to identify your specific model and year, then cross-reference the required OEM part number.

Q: What are the signs of a failing water pump impeller?

A: Common symptoms include the engine running hotter than normal or overheating, a weak or intermittent water stream from the "tell-tale" cooling outlet, and alarms from the engine's warning system. Visible damage like cracked, brittle, or missing vanes on the old impeller also indicates failure.

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

A: As a critical maintenance item, we recommend inspecting the impeller annually and replacing it every 1-2 years or every 100-200 hours of engine use, whichever comes first. Replacement intervals should be shorter for boats operated in saltwater or sandy/silty conditions.

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.