Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 Outboards

Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 Outboards

This complete water pump impeller repair kit provides everything needed to restore the cooling system on a wide range of Yamaha V6 outboards. It is designed for both 2-stroke models (including OX66, HPDI, and EFI) and 4-stroke models (including F150-F250 and SHO variants).

This assembly is a direct replacement for multiple Yamaha and aftermarket part numbers, ensuring a precise fit and reliable performance. The kit includes all necessary gaskets, O-rings, hardware, and the impeller housed in durable Nylon PA66 plastic.

• Installation Location: Lower Unit / Gearcase
• Core Components: Includes Impeller, Housing, Wear Plate, Gaskets, and Hardware
• Material Construction: Features a neoprene rubber impeller, Nylon PA66 housing, and stainless steel hardware for corrosion resistance.

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 Models

Yamaha 4-Stroke Models

Technical Specifications

Package Contents

This comprehensive kit includes the following components for a full service:

• 1 x Water Pump Impeller (6E5-44352-01-00)
• 1 x Cartridge Insert (61A-44322-02-00)
• 1 x Cartridge Outer Plate (6G5-44323-01-00)
• 1 x Water Pump Gasket (6E5-44315-A0-00)
• 2 x O-Rings (93210-86M38-00, 93210-37M67-00)
• 2 x Dowel Pins (93606-12019-00)
• 4 x Bolts with Washers (90119-08M14-00)
• 1 x Impeller Key/Woodruff Key (90280-04M05-00)

Installation Guide

1. Safety First: Disconnect the battery and remove the propeller before beginning work.
2. Drain Gear Oil: Place a drain pan under the lower unit and remove the drain and vent plugs to empty the gearcase oil.
3. Detach Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine. One bolt is often hidden under the trim tab anode.
4. Access the Pump: With the lower unit removed, unbolt and lift the old water pump housing to expose the impeller and wear plates.
5. Remove Old Components: Take out the old impeller, key, gaskets, and plates. Note their orientation for correct reassembly.
6. Clean Surfaces: Thoroughly clean the mounting surfaces on the gearcase, removing any old gasket material or corrosion.
7. Install New Kit: Install the new base gasket, wear plate, impeller key, and impeller. Lightly grease the inside of the new housing and slide it down while turning the driveshaft clockwise.
8. Secure Housing: Align and install the new housing, then tighten the bolts to the manufacturer's specified torque.
9. Reassemble: Re-install the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly. Fasten all bolts securely.
10. Refill and Test: Refill the lower unit with fresh gear oil. Reconnect the battery, start the engine using a water source (flushing muffs), and confirm water is exiting the tell-tale port.

Troubleshooting & FAQ

How do I confirm this kit fits my exact engine model?

The best way is to check your engine's model and year against the compatibility tables above. You can also verify by matching the OEM part numbers listed (e.g., 61A-W0078-A2-00) with your engine's service manual or an online parts diagram. Our serial number guides linked above can help you identify your engine.

What are common signs that my water pump impeller needs replacement?

The most common symptoms of a failing impeller are a weak or non-existent water stream from the tell-tale outlet, and your engine overheating, which may trigger an alarm. It's crucial to shut down the engine immediately if you suspect overheating.

How often should I replace the water pump impeller?

As a general maintenance guideline, impellers should be inspected annually and replaced every 1 to 2 years (or every 100-200 hours of use), regardless of visible wear. Operating in saltwater or sandy/silty conditions may require more frequent replacement.

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.