Water Pump Impeller Repair Kit for Yamaha 6–15 HP 4-Stroke Outboards – Replaces 68T-W0078-00-00 and 68T-W0078-01-00
Water Pump Impeller Repair Kit for Yamaha 6–15 HP 4-Stroke Outboards – Replaces 68T-W0078-00-00 and 68T-W0078-01-00 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Impeller Repair Kit for Yamaha 6–15 HP 4-Stroke Outboard...
Water Pump Impeller Repair Kit for Yamaha 6–15 HP 4-Stroke Outboards – Replaces 68T-W0078-00-00 and 68T-W0078-01-00 is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Repair Kit is intended for selected Yamaha 4-stroke outboards in the 6 HP, 8 HP, 9.9 HP, and 15 HP ranges, including F6, F8, T8, F9.9, FT9.9, T9.9, and F15 applications listed below. It is designed to help restore the lower-unit cooling-water pump during routine service or repair.
The kit is listed as a replacement for Yamaha part numbers 68T-W0078-00-00 and 68T-W0078-01-00. Additional aftermarket references may vary by supplier and application, so always compare the original part, engine model code, year, and serial-number range before ordering.
- Complete water-pump service kit for selected Yamaha 4-stroke outboards.
- Includes the pump housing, impeller, liner or cartridge components, seals, key, and mounting hardware shown below.
- Designed as an aftermarket replacement for the listed OEM references.
Part Number Matrix
Use these references together with the compatibility information and the original component for verification.
| 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
The applications below are reference information for selected Yamaha 4-stroke outboards. Exact fitment can vary by model code, year, shaft configuration, and serial-number range. Confirm the complete engine identification and compare the original water-pump components before purchase.
| 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 applications |
Technical Specifications
- Product Type
- Water pump impeller repair kit
- Application
- Selected Yamaha 4-stroke outboards from 6 HP through 15 HP
- Installation
- Aftermarket replacement for the listed applications
- Housing Material
- Nylon water-pump housing; CR-neoprene impeller and seals; stainless-steel 316 wear plate and liner
- Housing Color
- Black
- Weight
- 0.27 kg (0.6 lb)
- Cooling System Function
- Restores the water-pump components used to circulate cooling water through the outboard
- Returns
- 30-day refund or replacement
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 remove or isolate the spark-plug leads before starting work.
- Place a drain pan under the lower unit. If required for your service procedure, remove the gearcase oil drain screw and drain the oil.
- Remove the fasteners securing the lower unit to the upper casing, then carefully lower the gearcase.
- Remove the bolts and old water-pump housing assembly from the driveshaft.
- Clean the mating surfaces and inspect the driveshaft, keyway, and surrounding components for wear or damage.
- Install the new woodruff key, impeller, liner or cartridge components, seals, and related parts in the correct order. Ensure the impeller vanes are oriented correctly.
- Seat the new housing and tighten the fasteners to the engine manufacturer’s specified torque.
- Reinstall the lower unit, refill the gearcase with the correct lubricant if it was drained, and reconnect the battery.
- Run the engine in an appropriate test tank or on a suitable flushing device and verify a strong, consistent tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm fitment for my Yamaha outboard?
Check the complete engine model code, horsepower, stroke, year, shaft configuration, and serial-number range. Compare the original pump components and the original part number with the references in this listing. The horsepower or model family alone is not sufficient to confirm fitment.
What are common signs of a failing water-pump impeller?
Symptoms may include a weak or missing tell-tale stream, an overheating warning, unusually high engine temperature, or reduced cooling performance. A removed impeller may show cracked, brittle, deformed, or missing vanes.
How often should the impeller be replaced?
Replace the impeller according to the engine manufacturer’s maintenance schedule and inspect it regularly. Service may be needed sooner when the outboard is used in sandy, silty, weedy, or saltwater conditions.
Does this kit include the water-pump housing?
Yes. The package includes one water-pump housing, one impeller, cartridge components, seals, a woodruff key, an O-ring, and four bolts as listed in the package contents section.
Is this an OEM part?
No. This listing is for an aftermarket replacement kit. Yamaha part numbers are provided for reference and fitment comparison only.
What is the return coverage?
The listed return coverage is a 30-day refund or replacement. The product should be unused and in its original condition where applicable. Contact support with your order details if an issue occurs.
Safety & Important Information
- Verify the exact engine model, year, serial-number range, and original part before ordering.
- Do not operate an outboard with inadequate cooling-water flow. Stop the engine if the tell-tale stream is weak or absent.
- This is an aftermarket replacement kit and is not manufactured by Yamaha.
- Follow the engine manufacturer’s service manual for disassembly, torque values, lubrication, testing, and safety procedures.
- Professional installation is recommended when the correct service procedure or fitment cannot be confirmed.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world operating conditions.
- Global Fulfillment — Standard and expedited delivery options are shown at checkout where available.
- Manufacturer-Direct Value — We work with manufacturing partners to provide replacement components at practical prices.
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