Water Pump Repair Kit – Fits Yamaha F15C/F20 Outboard (Replaces 6AH-W0078-00-00)
Water Pump Repair Kit – Fits Yamaha F15C/F20 Outboard (Replaces 6AH-W0078-00-00) 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 Repair Kit – Fits Yamaha F15C/F20 Outboard (Replaces 6AH...
Water Pump Repair Kit – Fits Yamaha F15C/F20 Outboard (Replaces 6AH-W0078-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit – Fits Yamaha F15C/F20 Outboard (Replaces 6AH-W0078-00-00) includes all crucial components needed to service your engine's cooling system. It is engineered for Yamaha F15C and F20 series 4-stroke outboards (15–20 HP) manufactured from 2001 to present.
This kit provides a direct interchange for Yamaha part number 6AH-W0078-00-00 and A.impellers 6AH-W0078-00.
- Installation: Mounts in the lower unit.
- Complete Service: Includes the impeller, housing, wear plates, gaskets, and hardware.
- Fitment Type: Designed as a direct OEM-equivalent replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 6AH-W0078-00-00 |
| A.impellers | 6AH-W0078-00 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
For Yamaha Outboards: This kit is confirmed to fit the following 15 HP and 20 HP 4-stroke models. Please verify your specific model number.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F15CELH | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15CESH | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15CMLH | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15CPLH | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15LEHA | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15LMHA | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F15SEHA | 15 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20ELH | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20ESH | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20ESR | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20LEA | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20LPA | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20MLH | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20MSH | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20PLH | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20PLR | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20SEA | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20SEHA | 20 | 4-Stroke | 6AH-W0078-00-00 | |
| Yamaha | F20SMHA | 20 | 4-Stroke | 6AH-W0078-00-00 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Lower Unit
- Connection
- Direct Shaft Mount
- Housing Material
- Metal/Plastic Composite
- Housing Color
- Silver/Black
- Dimensions
- 5.0" H x 13.0" W x 13.0" L
- Fitting Type
- Direct OEM Replacement
- Thread Size
- M8 x 45mm (Bolts)
- Included Components
- Includes complete impeller, housing, gaskets, and hardware
What’s in the Box
- 1 x Water Pump Housing (6AH-44311-00-00)
- 1 x Cartridge Insert (63V-44322-00-00)
- 1 x Water Seal Damper (6L2-44367-00-00)
- 1 x Impeller (63V-44352-01-00)
- 1 x Woodruff Key (664-44338-00-00)
- 1 x O-Ring (93210-49046-00)
- 1 x Cartridge Outer Plate (68T-44323-00-00)
- 2 x Dowel Pins (93604-10M03-00)
- 4 x Bolts (97095-08045-00)
- 2 x Plates (63V-44328-01-00)
Installation Notes
Follow these general steps for installation. Always consult your service manual for model-specific instructions.
- Disconnect the battery and remove the engine cover.
- 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 midsection and carefully lower it.
- Unbolt and remove the old water pump housing assembly from the driveshaft.
- Clean the mounting surfaces and inspect the driveshaft for wear or corrosion.
- Install the new Woodruff key, impeller, gaskets, and wear plates as provided in the kit. Ensure the impeller vanes are oriented correctly.
- Secure the new water pump housing and torque its bolts to the manufacturer's specification.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are properly aligned.
- Refill the gearcase with the correct marine gear lubricant.
- Attach a water supply ("muffs") to the lower unit, start the engine, and verify a strong, steady stream of water from the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this kit will fit my specific Yamaha engine?
The best way to ensure compatibility is to match your engine's model and serial number against the Engine & Model Compatibility list above. Also, cross-reference the OEM part number (6AH-W0078-00-00) with your service manual or current part.
What are the signs of a failing water pump?
Common symptoms include a weak or intermittent water stream from the "tell-tale" outlet, engine overheating alarms, or visible steam from the engine housing. Reduced cooling performance can cause serious engine damage if not addressed.
How often should I replace my outboard's water pump impeller?
As a general maintenance guideline, it is recommended to inspect and likely replace the water pump impeller and gaskets every 100 operating hours or at least once per year, whichever comes first.
Is this a complete kit, or do I need to buy other parts?
This is a comprehensive kit containing the impeller, housing, wear plates, gaskets, O-rings, and mounting hardware required for a standard water pump service. No other components are typically needed.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 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. 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.
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