Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 Outboard Motors (Replaces 61A-W0078-A2-00)

Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 Outboard Motors (Replaces 61A-W0078-A2-00)

This water pump repair kit is engineered for a wide range of Yamaha 2-stroke and 4-stroke V6 outboard engines from 150HP to 300HP (1992–2023+), providing all the necessary components for a complete and reliable water pump service. It ensures your outboard's cooling system functions efficiently, preventing overheating and potential engine damage.

This assembly is a direct replacement for multiple Yamaha and aftermarket part numbers, offering broad compatibility for many V6 models. Its design ensures a precise fit for straightforward installation in the lower unit.

• Complete Service Kit: Includes an impeller, housing, wear plate, insert cup, gaskets, o-rings, and all required hardware for a full replacement.
• Durable Materials: Features a robust Nylon PA66 housing, a high-performance neoprene impeller, and a stainless steel SS316 insert cup and plate for enhanced longevity and corrosion resistance.
• Installation Location: Designed for installation in the lower unit of the outboard motor.

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

This kit contains all the necessary parts for a complete water pump overhaul:

• 1 x Water Pump Impeller (6E5-44352-01-00)
• 1 x Impeller Housing
• 1 x Insert Cup (61A-44322-00)
• 1 x Wear Plate (6G5-44323-00)
• 1 x Water Pump Gasket (6E5-44315-A0-00)
• 1 x Impeller Key (90280-04M05)
• 1 x O-Ring (93210-37M67-00)
• 1 x O-Ring (93210-86M38-00)
• 2 x Pin (93606-12019)
• 4 x Bolt & Washer (97080-08045)

Installation Guide

1. Safety First: Disconnect the battery cables from the battery before beginning any work.
2. Remove Lower Unit: Drain the gearcase oil, then unbolt and carefully remove the lower unit (gearcase) from the outboard motor.
3. Access Pump: Place the lower unit in a secure position. Locate and unbolt the water pump housing.
4. Disassemble Old Pump: Carefully lift the old housing off. Remove the old impeller, woodruff key, wear plate, and gaskets. Note the orientation of the impeller fins.
5. Clean Surfaces: Thoroughly clean the mounting surfaces on the lower unit and the driveshaft, removing any old gasket material or sealant.
6. Install New Components: Place the new gasket and stainless steel wear plate onto the lower unit.
7. Install Impeller: Insert the new woodruff key into the driveshaft. Slide the new impeller down the shaft while turning the shaft clockwise to correctly orient the fins inside the new housing cup.
8. Secure Housing: Apply a light coat of marine grease to the inside of the housing. Place the new housing assembly over the impeller and secure it with the new bolts and washers, tightening them to the manufacturer's specified torque.
9. Reinstall Lower Unit: Re-attach the lower unit to the outboard motor, ensuring the water tube aligns correctly with the pump outlet.
10. Final Checks: Refill the gearcase with fresh oil. Reconnect the battery and start the engine using a water supply (flushing muffs) to verify proper water flow from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?
A: The surest way is to match your existing OEM part number to one of the numbers listed in our "Part Number Cross-Reference" table. Additionally, check your engine's model, horsepower, and year against our "Compatible Engine Models" list. For Yamaha owners, our linked serial number guide can help you confirm your exact model and year.

Q: What are common signs of a failing water pump impeller?
A: Key indicators include a weak or non-existent water stream from the tell-tale (pee hole), an engine overheating alarm, or a noticeable drop in water pressure on your gauges. A visual inspection of the old impeller may show cracked, brittle, or missing fins.

Q: How often should I replace the water pump impeller?
A: As a crucial preventative maintenance item, it is recommended to replace your water pump impeller and service the pump every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., more frequently in saltwater or sandy/muddy water).

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.