Complete Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces 6AH-W0078-00-00
Complete Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces 6AH-W0078-00-00 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.
Complete Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Out...
Complete Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces 6AH-W0078-00-00 is backordered and will ship as soon as it is back in stock.
Product Details
This complete water pump repair kit is designed for select Yamaha F15C and F20 4-stroke outboard motors. It provides the main water-pump service components needed to restore reliable cooling-water circulation and help protect the engine from overheating.
The kit is an aftermarket replacement for Yamaha OEM part number 6AH-W0078-00-00. Yamaha parts catalogs identify this number as a water pump repair kit for applicable F15C and F20 4-stroke models.
- Complete water pump repair kit with housing and service components.
- Designed for selected Yamaha 15 HP and 20 HP 4-stroke outboards.
- Aftermarket replacement part; not manufactured by Yamaha.
- Verify the engine model, year, and OEM part number before ordering.
Part Number Information
Use the following reference to compare the kit with the part listed in your engine parts catalog.
| Brand | Part Number | Description |
|---|---|---|
| Yamaha | 6AH-W0078-00-00 | Water pump repair kit reference |
Engine Compatibility
Catalog records identify this water pump repair kit on selected Yamaha F15C and F20 4-stroke outboards, including 2007–2010 applications. Model suffixes, production year, shaft configuration, and serial-number ranges can affect fitment, so compare your complete engine identification label and OEM part number before purchase.
| Brand | Model Family | Rated HP | Stroke | Documented Application Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F15C series | 15 | 4-Stroke | 2007–2010 catalog applications | 6AH-W0078-00-00 |
| Yamaha | F20 series | 20 | 4-Stroke | 2007–2010 catalog applications | 6AH-W0078-00-00 |
Technical Specifications
- Product Type
- Complete water pump repair kit
- Application
- Selected Yamaha F15C and F20 4-stroke outboard motors
- Replacement Reference
- Yamaha 6AH-W0078-00-00
- Installation
- Replacement water-pump service installation
- Product Status
- Aftermarket replacement; not an OEM Yamaha component
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 (6L2-44367-01-00)
- 1 x Water Pump 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 (6AH-44323-00-00)
- 2 x Plate (63V-44328-01-00)
- 2 x Dowel Pin (93604-10M03-00)
- 4 x Bolt (97095-08045-00)
Installation Notes
- Confirm the engine model, year, serial-number range, and existing water-pump part number before beginning work.
- Disconnect the battery according to the engine service-manual procedure and remove the engine cover as required.
- Remove the lower unit or gearcase to access the water-pump assembly.
- Remove the existing pump housing and service components.
- Clean the mating surfaces carefully and remove old gasket material, debris, and corrosion.
- Install the replacement components in the same order and orientation as the original parts, following the engine manufacturer's service manual.
- Reassemble the pump housing, tighten fasteners to the manufacturer's specified torque, and reinstall the lower unit.
- Before operating the engine, place the lower unit in water or use an appropriate flushing attachment. Confirm a steady tell-tale water stream and check for leaks or overheating.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Compare the engine brand, model family, horsepower, stroke, year, and serial-number range with your service manual or parts catalog. The OEM reference for this listing is 6AH-W0078-00-00. Do not rely on horsepower alone.
What are the signs of a failing water pump?
Common symptoms include engine overheating, an overheating alarm, reduced water flow, or a weak, intermittent, or missing stream from the tell-tale outlet.
How often should the water-pump components be replaced?
Replacement intervals depend on the manufacturer's maintenance schedule and operating conditions. Frequent use in saltwater, muddy water, or sandy conditions may require more frequent inspection and service.
Does this kit include the water-pump housing?
Yes. This listing is for a complete water pump repair kit and includes the housing and the service components listed in the “What’s in the Box” section.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement kit intended for applications that use the listed Yamaha OEM reference. Yamaha is a trademark of its respective owner and is used only to describe compatibility.
Can I install the kit without a service manual?
Water-pump service requires removal of the lower unit and correct component orientation and fastener torque. Use the correct engine service manual or have the work performed by a qualified marine technician.
Safety & Important Information
- Verify the complete engine identification and OEM part number before ordering.
- Do not operate the outboard without adequate water supply to the cooling system.
- Replace damaged, corroded, or worn related components discovered during installation.
- Follow the engine manufacturer's procedures for battery disconnection, lower-unit removal, seal installation, and bolt torque.
- This is an aftermarket replacement part and is not an original Yamaha component.
About Sea Sierra
- Marine Replacement Parts — We provide replacement components for common outboard maintenance and repair needs.
- Application-Focused Listings — Product information is organized around engine models, OEM references, and service requirements.
- Support for Fitment Checks — Compare your engine identification and original part number before ordering to help ensure the correct application.
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.
