Water Pump Impeller Kit for Yamaha F6 / F8 / F9.9 68T-W0078-00
Water Pump Impeller Kit for Yamaha F6 / F8 / F9.9 68T-W0078-00 is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller Kit for Yamaha F6 / F8 / F9.9 68T-W0078-00
Water Pump Impeller Kit for Yamaha F6 / F8 / F9.9 68T-W0078-00 is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Impeller Kit – Fits Yamaha F6/F8/F9.9 4-Stroke Outboards (Replaces 68T-W0078-00-00) provides a reliable solution for maintaining your engine’s cooling system. It is designed for a wide range of Yamaha 4-stroke outboards from 6 to 9.9 HP manufactured from 2000 to 2019 and beyond, including F6, F8, and F9.9 series models.
This kit serves as a direct replacement for Yamaha OEM part numbers 68T-W0078-00-00, 68T-W0078-01-00, and 68T-W0078-02-00, and interchanges with Sierra 18-3450 and JLM YHJB-68T.
- Ensures direct-fit installation, matching OEM specifications.
- Includes a durable rubber impeller, gaskets, and plates for a full service.
- All necessary bolts and hardware are included for convenience.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 68T-W0078-00-00 |
| Yamaha | 68T-W0078-01-00 |
| Yamaha | 68T-W0078-02-00 |
| Sierra | 18-3450 |
| JLM | YHJB-68T |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for a variety of Yamaha 4-stroke models. Please check your specific model and year against this list to ensure proper fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F6AMHL, F6AMHS | 6 | 4-Stroke | 2001 | 68T-W0078-00-00 | |
| Yamaha | F6A, F6B | 6 | 4-Stroke | 2000–2009 | 68T-W0078-00-00 | |
| Yamaha | F8CMHL, F8CMHS | 8 | 4-Stroke | 2001–2014 | 68T-W0078-00-00 | |
| Yamaha | F8FMHL, F8FMHS | 8 | 4-Stroke | 2015–2017 | 68T-W0078-00-00 | |
| Yamaha | F8LMHB, F8SMHB | 8 | 4-Stroke | 2018+ | 68T-W0078-00-00 | |
| Yamaha | F8C | 8 | 4-Stroke | 2000+ | 68T-W0078-00-00 | |
| Yamaha | F8F | 8 | 4-Stroke | 2015+ | 68T-W0078-00-00 | |
| Yamaha | F9.9FMHL, F9.9FMHS | 9.9 | 4-Stroke | 2008–2012 | 68T-W0078-00-00 | |
| Yamaha | F9.9JMHL, F9.9JMHS | 9.9 | 4-Stroke | 2013–2017 | 68T-W0078-00-00 | |
| Yamaha | F9.9LMHB, F9.9SMHB | 9.9 | 4-Stroke | 2018+ | 68T-W0078-00-00 | |
| Yamaha | F9.9F | 9.9 | 4-Stroke | 2008–2012 | 68T-W0078-00-00 | |
| Yamaha | F9.9J | 9.9 | 4-Stroke | 2013+ | 68T-W0078-00-00 |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Direct OEM replacement
- Housing Material
- Various materials (includes rubber impeller)
- Housing Color
- Black/natural
- Weight
- 191 grams (0.42 lb)
- Warranty
- Manufacturer dependent
- Other Technical Attributes
- Included in Yamaha Maintenance Kit (AMKITF6A)
What’s in the Box
- 1 x Cartridge Insert (63V-44322-00-00)
- 1 x Water Seal Damper 2 (68T-44366-00-00 / 68T-44366-01-00)
- 1 x Impeller (68T-44352-00-00)
- 1 x Woodruff Key (63V-44338-00-00 / 664-44338-00-00)
- 1 x O-Ring (93210-44398-00 / 93210-44704-00 / 93210-447-04-00)
- 1 x Cartridge Outer Plate (68T-44323-00-00)
- 4 x Bolts (97095-08045-00)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Shift the outboard into neutral gear.
- Remove the bolts securing the lower unit (gearcase) to the upper casing and carefully lower it.
- Locate the water pump housing on top of the gearcase and remove its mounting bolts.
- Slide the housing up to expose the old impeller, gaskets, and wear plate. Note their orientation.
- Remove the old impeller, Woodruff key, and seals. Clean all surfaces thoroughly.
- Install the new components from the kit in the reverse order of removal. Lightly lubricate the new impeller and housing interior.
- Ensure the impeller blades are curved in the correct direction as you slide the housing down.
- Torque the housing bolts to the manufacturer's specification.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly.
- Once assembled, start the engine in water and verify strong, steady water flow from the tell-tale outlet.
Troubleshooting & FAQ
What are the signs of a failing water pump impeller?
Key indicators include engine overheating alarms, a weak or non-existent water stream from the "tell-tale" outlet, and in severe cases, a melted pump housing. Regular inspection is recommended.
How often should I replace my outboard's impeller?
For optimal performance and to prevent engine damage, most manufacturers recommend replacing the impeller every 1-2 years or every 100-200 operating hours, whichever comes first. Service intervals should be shorter in saltwater or sandy/silty conditions.
How can I confirm this kit fits my specific engine?
The most reliable method is to match your engine's model and year to the "Engine & Model Compatibility" table. You can also cross-reference your existing part number with the "Part Number Matrix."
Why are there multiple part numbers listed for some components?
Manufacturers often supersede part numbers over time with newer revisions. The multiple numbers listed (e.g., for the O-Ring or Water Seal Damper) are all confirmed equivalents for this kit, ensuring compatibility across different production years.
Is this an OEM part?
This is a high-quality aftermarket replacement part, not an OEM component. It is engineered to meet or exceed original equipment specifications and is manufactured in an ISO 9002 certified facility with rigorous quality control.
How fast is shipping?
We provide fast worldwide shipping, with typical transit times of 5–15 days. Standard shipping is free for most orders, and expedited options are available at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects during normal use. If you encounter an issue, please contact our support team with your order number. Unused items in their original packaging can be returned within our standard return period. Please see our full policy page for details.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
