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

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

This water pump impeller is designed for a wide range of Yamaha 2-Stroke and 4-Stroke outboard engines from 100 HP to 250 HP. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring reliable performance for your engine's cooling system.

Engineered to meet original equipment manufacturer (OEM) specifications, this impeller is a crucial component for preventing engine overheating by maintaining proper water circulation. It is made from durable, high-quality rubber/neoprene for longevity in marine environments.

• Installation: Direct replacement for a straightforward installation.
• Connection: Keyway mount (requires a Woodruff key, not included).
• Compatibility: Fits V4, V6, and SHO Yamaha outboard models.

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.

Yamaha 2-Stroke Engines

Yamaha 4-Stroke Engines

Technical Specifications

Package Contents

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

Installation Guide

1. Disconnect Power: Disconnect the battery cables before beginning any work. Ensure the engine is tilted up and secured.
2. Remove Lower Unit: Drain the gearcase lubricant. Remove the bolts connecting the lower unit (gearcase) to the upper driveshaft housing.
3. Access Water Pump: With the lower unit removed, locate the water pump housing on top of the gearcase. Remove the housing bolts to expose the impeller.
4. Inspect and Remove Old Impeller: Note the rotational direction of the old impeller fins. Remove the old impeller, key, gaskets, and wear plates.
5. Install New Impeller: Clean the housing interior thoroughly. Install the new wear plate and gasket, place the Woodruff key in the driveshaft, and slide the new impeller on, rotating the driveshaft in its normal direction of rotation to bend the fins correctly.
6. Reassemble and Test: Reassemble the pump housing, ensuring all seals are correctly seated. Re-attach the lower unit, refill the gearcase with fresh lubricant, and test the engine using a water source (flushing muffs) to confirm water is pumping correctly from the tell-tale port.

Troubleshooting & FAQ

How do I confirm this impeller fits my engine?
First, check the "Part Number Cross-Reference" table to see if your existing impeller's part number is listed. Second, review the detailed "Compatible Engine Models" tables to find your specific Yamaha model, horsepower, and year. Using our linked Yamaha serial number and parts diagram guides can further help verify fitment.

What are the signs of a failing impeller?
The most common symptoms are a weak or no water stream from the tell-tale (pee hole), or your engine overheating alarm sounding. Reduced engine performance at high RPMs can also be a sign of poor cooling.

How often should I replace the water pump impeller?
As a general maintenance rule, it is recommended to inspect your impeller annually and replace it every 1 to 2 years (or every 100-200 operating hours), regardless of visible wear. Impellers can become brittle and fail unexpectedly, especially when used in saltwater or sandy/silty conditions.

OEM vs. Aftermarket?
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.