Water Pump Impeller Repair Kit – Fits Yamaha 6-15 HP (Replaces 68T-W0078-00-00, 68T-W0078-01-00)
Water Pump Impeller Repair Kit – Fits Yamaha 6-15 HP (Replaces 68T-W0078-00-00, 68T-W0078-01-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Repair Kit – Fits Yamaha 6-15 HP (Replaces 68T-...
Water Pump Impeller Repair Kit – Fits Yamaha 6-15 HP (Replaces 68T-W0078-00-00, 68T-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This comprehensive Water Pump Impeller Repair Kit is engineered for Yamaha 4-Stroke outboards including 6 HP, 8 HP, 9.9 HP, and 15 HP models (F6, F8, T8, F9.9, FT9.9, T9.9, F15) manufactured between 2000 and 2015. It provides all necessary components to restore your engine's cooling system to factory specifications, ensuring reliability and preventing overheating.
The kit serves as a direct interchange for Yamaha part numbers 68T-W0078-00-00, 68T-W0078-01-00, and 68T-W0078-02-00, as well as aftermarket equivalents from Sierra (18-3410, 18-3450) and GLM (12138, 12046).
- Designed for direct OEM-level fitment and performance.
- Engineered with a high-flow impeller for improved cooling capacity.
- Includes a complete set of seals, gaskets, and hardware for a full service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 68T-W0078-00-00 |
| Yamaha | 68T-W0078-01-00 |
| Yamaha | 68T-W0078-02-00 |
| Sierra | 18-3410 |
| Sierra | 18-3450 |
| GLM | 12138 |
| GLM | 12046 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
This kit is designed for select Yamaha 4-stroke outboard models. It is critical to verify your engine's specific model code, horsepower, and year, as fitment can vary even within the same series.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F6 | 6 | 4-Stroke | 2001–2008 | 68T-W0078-00-00 | F6MLH, F6MLHZ, F6AMLH, F6MSH, F6MSHZ, F6AMSH, F6MSHA, F6MLHC |
| Yamaha | F8/T8 | 8 | 4-Stroke | 2001–2010 | 68T-W0078-00-00 | F8MSHB, F8LMHB, F8LMHA, F8MLHZ, F8SMHB, F8CMSH |
| Yamaha | F9.9/T9.9 | 9.9 | 4-Stroke | 2007–2015 | 68T-W0078-00-00 | F9.9LEA, F9.9LMHB, F9.9FMSH, F9.9SMHB, F9.9LEHB, F9.9FELR, F9.9FMLH |
| Yamaha | F15 | 15 | 4-Stroke | 2001–2009 | 68T-W0078-00-00 | Lower unit gearcase models |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Direct OEM Replacement
- Housing Material
- Nylon Water Pump Housing, CR-Neoprene Water Pump Impeller and Seals, Stainless Steel 316 Wear Plate & Liner
- Housing Color
- Black
- Weight
- 0.27 kg (0.6 lb)
- Warranty
- 30-day refund/replacement
- Other Technical Attributes
- Designed for higher flow rates and improved cooling flow
What’s in the Box
- 1 x Water Pump Housing (63V-44301-00-00)
- 1 x Water Pump Impeller (68T-44352-00-00)
- 1 x Cartridge Insert (68T-44322-00-00)
- 1 x Cartridge Outer Plate (68T-44323-00-00)
- 1 x Water Seal Damper (68T-44366-00-00)
- 1 x Woodruff Key (63V-44338-00-00)
- 1 x O-Ring (93210-44398-00)
- 4 x Bolts (97095-08045-00)
Installation Notes
- Disconnect the battery and spark plug leads for safety.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.
- Remove the bolts securing the lower unit (gearcase) to the engine's upper casing and carefully lower it.
- Unbolt and remove the old water pump housing assembly from the driveshaft.
- Clean the mating surfaces and inspect the driveshaft for any wear or damage.
- Install the new woodruff key, impeller, liner, and seals as per the kit diagram. Ensure the impeller vanes are oriented correctly.
- Seat the new housing and tighten the bolts to the manufacturer's recommended torque.
- Reinstall the lower unit, refill with fresh gearcase oil, and reconnect the battery.
- Start the engine in water and verify a strong, consistent stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this kit fits my specific Yamaha outboard?
This kit is designed for a range of models, but subtle variations exist. It is essential to verify your engine's exact model, horsepower, serial number range, and year against the compatibility chart. Some reviews note fitment issues on newer models, so cross-referencing your part numbers is the most reliable method.
What are the signs of a failing water pump impeller?
Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, or a reduction in engine performance. Upon inspection, a worn impeller may have cracked, brittle, or missing vanes.
How often should I replace the water pump impeller?
As a preventative maintenance item, it is recommended to replace the impeller every 1 to 2 years or every 100-200 hours of operation, whichever comes first. Service intervals should be shorter if operating frequently in sandy, silty, or saltwater environments.
Does this kit include the water pump housing?
Yes, this is a complete repair kit that includes the water pump housing (part no. 63V-44301-00-00), impeller, wear plate, seals, and all necessary hardware for a full replacement.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation is highly recommended for safety, performance, and to prevent damage to your engine.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions, typically arriving in 5–15 days. Express options are available.
- Manufacturer-Direct Value — By working directly with manufacturers, we offer fair pricing without compromising on materials or quality control.
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