Water Pump Impeller Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078)

Water Pump Impeller Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078)

This water pump impeller service kit is designed for a wide range of Yamaha V6 outboard engines. It provides the necessary components to restore the performance of your engine's cooling system, excluding the main housing.

It directly replaces multiple Yamaha and aftermarket part numbers, ensuring broad compatibility for 2-stroke models from 1991 to 2005 and 4-stroke models from 2002 to present, covering horsepower ratings from 150 to 300 HP.

• Direct Replacement: Engineered to match OEM specifications for a straightforward installation.
• Comprehensive Kit: Includes a new neoprene impeller, wear plate, pump cup, gaskets, o-rings, and all necessary bolts and pins for a complete service.
• Wide Fitment: Compatible with dozens of Yamaha 2-stroke (VX, SX, VZ, Z, LZ series) and 4-stroke (F, LF, Z series) 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 Models

Yamaha 4-Stroke Models

Technical Specifications

Package Contents

• 1 x Neoprene Impeller (6E5-44352-01-00)
• 1 x Pump Cup (61A-44322-00)
• 1 x Wear Plate (6G5-44323-00)
• 1 x Water Pump Gasket (6E5-44315-A0-00)
• 1 x Woodruff Key (90280-04002-00)
• 1 x O-Ring (93210-37M67-00)
• 1 x O-Ring (93210-86M38-00)
• 2 x Dowel Pin (93606-12019)
• 4 x Bolt with Washer (90119-08M14-00)

Explosion Diagram

Installation Guide

1. Safety First: Disconnect the battery cables from the battery before beginning any work.
2. Access the Lower Unit: Remove the engine's upper cowling. Shift the outboard into neutral to facilitate removal of the lower unit (gearcase).
3. Remove Lower Unit: Loosen and remove the bolts securing the lower unit to the engine's midsection. Carefully lower and separate the gearcase.
4. Disassemble Water Pump: Locate the water pump assembly on top of the gearcase. Remove the four bolts to lift off the pump housing.
5. Inspect and Remove Old Parts: Take note of the old parts' orientation. Remove the old impeller, wear plate, gaskets, and pump cup. Clean all mating surfaces thoroughly.
6. Install New Components: Place the new Woodruff key onto the driveshaft flat spot. Install the new wear plate and gasket. Slide the new impeller onto the shaft, turning it clockwise to align the vanes correctly.
7. Reassemble Pump: Install the new pump cup over the impeller. Place the new gasket and o-rings on the housing. Reinstall the housing and tighten the bolts to the manufacturer's specified torque.
8. Reinstall Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft and water tube align correctly. Secure it with the mounting bolts.
9. Final Checks: Reconnect the battery. Start the engine using a water supply (flushing muffs) and confirm a steady stream of water is exiting the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my specific Yamaha engine?
Check the "Compatible Engine Models" tables on this page to find your engine's model, HP, and year range. You can also cross-reference your existing part number with the numbers in the "Part Number Cross-Reference" section. For further confirmation, use the Yamaha Parts Catalog link provided above.

What are the signs of a failing water pump impeller?
Common signs include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "tell-tale" cooling outlet, and finding brittle, cracked, or melted pieces of the old impeller upon inspection.

How often should the water pump impeller be replaced?
For optimal engine protection, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. This interval should be shorter if operating primarily 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.