Yamaha Water Pump Repair Kit 6GR-W0078-01-00 - Special Order
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Yamaha 6GR-W0078-01-00 Water Pump Repair Kit is a genuine OEM water pump service kit for Yamaha XTO® Offshore 425 HP and XTO® Offshore 450 HP outboards. This kit includes the key pump components needed to service the water pump cartridge assembly, restore cooling-water flow, and help protect the engine from overheating.
Key Features
- Genuine Yamaha OEM water pump repair kit
- Fits Yamaha XTO® 425 2018 and newer
- Fits Yamaha XTO® 450 2023 and newer
- Includes impeller, cartridge insert, outer cartridge plate, O-rings, dowel pins, bolts with washers, and key
- Supersedes Yamaha part number 6GR-W0078-00-00
- Current Yamaha part number: 6GR-W0078-01-00
Engine Compatibility
Compatible with:
- Yamaha XTO® Offshore 425 HP — 2018 and newer
- Yamaha XTO® Offshore 450 HP — 2023 and newer
Serial Number Fitment Notice
Fitment should always be confirmed using your Yamaha outboard model and serial number. XTO water pump components can vary by production range and gearcase configuration.
When This Part Needs Replacement
Replace this kit during scheduled water pump service, when cooling-water flow is weak, after an overheating alarm, or any time the lower unit is removed and the pump components show wear.
Installation Notes
Kit includes:
- 1 × Insert, Cartridge — 6GR-44322-00-00
- 1 × O-Ring — 93210-97690-00
- 1 × O-Ring — 93211-08001-00
- 1 × O-Ring — 93210-37M67-00
- 1 × Impeller — 6GR-44352-00-00
- 1 × Outer Plate, Cartridge — 6GR-44323-00-00
- 2 × Pin, Dowel — 93606-12019-00
- 4 × Bolt, With Washer — 90119-08M16-00
- 1 × Key — 6AW-44336-00-00
Alternate/Superseded Part Numbers
- 6GR-W0078-01-00
- Superseded from 6GR-W0078-00-00
Parts Desk Insight
This is the correct style of kit for Yamaha's large XTO platform, not a generic impeller-only service part. The included cartridge pieces, O-rings, dowels, bolts, and key make it a more complete pump service kit for keeping cooling flow reliable on high-output XTO engines.
Special Order: This product is not currently in store inventory but may be available from the Manufacturer. Special Orders may take up to 2 weeks to arrive. Call the parts desk before ordering if you need a closer estimate on delivery time.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.