Water Pump Impeller Kit – Fits Yamaha 150-300 HP Outboards (Replaces 61A-W0078-A2-00, 61A-W0078-A3-00)

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

This water pump repair kit is designed for Yamaha 150–300 HP V6 outboard motors, including most 2-stroke models from 1991–2005 and 4-stroke models from 2002 and newer. The kit includes all necessary components to replace the impeller and related wear parts, restoring your engine’s cooling system to optimal condition.

This kit is a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility with a wide range of Yamaha V6 engines.

• Installation Type: Direct replacement water pump service kit.
• Compatibility: Fits select Yamaha 150, 175, 200, 225, 250, and 300 HP models.
• Function: Restores cooling system performance by replacing key water pump components.

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 (90280-04M05-00)
• 1 x O-Ring (93210-37M67-00)
• 1 x O-Ring (93210-86M38-00)
• 2 x Dowel Pin (93606-12019-00)
• 4 x Bolt with Washer (90119-08M14-00)

Installation Guide

Professional installation is recommended. The following is a general guide and may not apply to every model.

1. Safety First: Disconnect the battery and ensure the engine is securely mounted.
2. Drain Gear Lube: Place a drain pan under the lower unit and remove the lower and upper gear lube drain screws to drain the oil.
3. Remove Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine's midsection. Note the location of each bolt as they may differ in length.
4. Access the Water Pump: With the lower unit removed, locate the water pump housing on top of the gearcase.
5. Disassemble Pump Housing: Unbolt and remove the water pump housing to expose the impeller, wear plate, and pump cup.
6. Inspect and Replace Parts: Remove the old impeller, cup, plate, gaskets, and O-rings. Clean all surfaces thoroughly.
7. Install New Components: Install the new components from the kit in reverse order. Lightly grease the new impeller and insert it while turning the driveshaft clockwise to seat the vanes.
8. Reassemble Housing: Secure the new housing with the new bolts and torque them to the manufacturer's specifications.
9. Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Reinstall the mounting bolts.
10. Refill Gear Lube: Fill the lower unit with fresh gear lube from the bottom drain hole until it seeps out of the upper hole. Reinstall both drain screws with new gaskets.
11. Test Operation: Reconnect the battery. Start the engine in a test tank or with a water flusher to confirm the pump is operating correctly (check for a steady stream of water from the tell-tale).

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yamaha engine?

A: The best way is to check your engine's model and year against our compatibility tables. You can also verify by matching the OEM part number from your old components to the numbers listed in the "Part Number Cross-Reference" section. When in doubt, use the Yamaha Parts Catalog link above to find your exact model's diagram.

Q: What are the signs that my water pump impeller needs replacing?

A: Common signs of a failing impeller include a weak or nonexistent water stream from the "tell-tale" port, engine overheating alarms, or a noticeable drop in water pressure on your gauges. It is a critical wear item for your engine's cooling system.

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

A: For preventative maintenance, most manufacturers recommend replacing the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you operate frequently in sandy or debris-filled water.

Q: What's the difference between this kit and the OEM Yamaha kit?

A: This is a high-quality aftermarket kit designed to meet or exceed OEM specifications. While the OEM kit may use a specific housing material like Nylon PA66, our materials are selected for comparable performance and durability. You get a reliable repair solution at a more competitive price.

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.