Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces Yamaha 6AH-W0078-00-00
Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces Yamaha 6AH-W0078-00-00 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – ...
Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces Yamaha 6AH-W0078-00-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Repair Kit is designed for cooling-system service on selected Yamaha F15C and F20 four-stroke outboards. The kit is associated with Yamaha OEM water pump repair kit number 6AH-W0078-00-00 and is intended for installation in the lower unit.
Catalog records identify this repair kit on selected 2007 and 2008 Yamaha F15C and F20 four-stroke models. Yamaha used different water-pump kit revisions on some later model years, so confirm the engine model, year, serial range, and existing part number before ordering.
- Service application: Lower-unit water pump repair.
- Product type: Complete water pump repair kit.
- Engine family: Selected Yamaha F15C and F20 four-stroke outboards.
- Replacement reference: Yamaha 6AH-W0078-00-00.
- Brand status: Aftermarket replacement; not manufactured by Yamaha.
Part Number References
Use the following manufacturer reference to compare the kit with the part currently installed on your engine. Do not assume that a similar-looking impeller or housing is interchangeable without checking the complete application.
| Brand | Reference | Application note |
|---|---|---|
| Yamaha | 6AH-W0078-00-00 | Water pump repair kit reference |
Engine Compatibility
The compatibility records below show the OEM kit on selected 2007 and 2008 Yamaha four-stroke catalog applications. Model suffixes, shaft lengths, controls, and serial conditions must match your engine.
| Brand | Model examples | Rated HP | Stroke | Catalog years shown | OEM kit reference |
|---|---|---|---|---|---|
| Yamaha | F15CELH, F15CESH, F15CMLH, F15CMSH, F15CPLH | 15 HP | 4-Stroke | 2007–2008 | 6AH-W0078-00-00 |
| Yamaha | F20ELH, F20ELR, F20ESH, F20ESR, F20MLH, F20MSH, F20PLH, F20PLR | 20 HP | 4-Stroke | 2007–2008 | 6AH-W0078-00-00 |
Important: The Yamaha reference changes on some later applications, including 6AH-W0078-01-00 and 6AH-W0078-02-00 in catalog records. Those revised references should not be treated as confirmed equivalents for this kit without application-specific verification.
Technical Specifications
- Product Type
- Water pump repair kit
- Installation Location
- Lower unit
- Engine Type
- Yamaha four-stroke outboard
- Rated Applications
- Selected F15C and F20 models
- Replacement Reference
- Yamaha 6AH-W0078-00-00
- Manufacturer Status
- Aftermarket replacement, not OEM
What's in the Box
The listed service-kit contents are intended to replace the principal water-pump components during a standard repair. Compare the supplied parts with the removed assembly before installation.
- 1 x Water pump housing
- 1 x Cartridge insert
- 1 x Water seal damper
- 1 x Impeller
- 1 x Woodruff key
- 1 x O-ring
- 1 x Cartridge outer plate
- 2 x Dowel pins
- 4 x Bolts
- 2 x Plates
Component markings and packaging may vary by production batch. The package contents above describe this listing and should be checked against the parts received before disassembly of the engine.
Installation Notes
Installation should be performed with the engine supported securely and with the appropriate service manual available. Follow the manufacturer's torque values, sealing instructions, and shift-shaft alignment procedures for your exact model.
- Disconnect the battery and secure the outboard in a stable position.
- Remove the lower unit according to the service-manual procedure for your engine.
- Remove the existing water-pump housing and inspect the driveshaft, keyway, water tube, and mating surfaces.
- Clean the pump mounting area and remove old gasket material without damaging the sealing surfaces.
- Install the supplied gasket or seal components, Woodruff key, impeller, plates, and housing in the correct order.
- Orient the impeller vanes as required by the service instructions and secure the housing with the supplied hardware.
- Reinstall the lower unit, ensuring correct driveshaft, shift-shaft, and water-tube engagement.
- Refill the gearcase with the correct marine lubricant if the lower unit was drained.
- Run the engine only with an adequate water supply and confirm a steady cooling-water tell-tale stream.
Maintenance and Troubleshooting
- Inspect the impeller and water-pump seals during scheduled cooling-system service.
- Replace the impeller if the vanes are cracked, permanently bent, brittle, or damaged by dry running.
- A weak or intermittent tell-tale stream, overheating warning, or visible steam can indicate a cooling-system problem.
- Never operate the outboard without an adequate water supply.
Frequently Asked Questions
How do I confirm fitment?
Match the complete engine model and year, including the suffix, against the compatibility information. Then compare the existing water-pump kit reference with Yamaha 6AH-W0078-00-00. If your engine uses a later 6AH-W0078-01-00 or 6AH-W0078-02-00 revision, verify the application separately before ordering.
Is this an OEM Yamaha kit?
No. This is an aftermarket replacement kit intended for the listed applications. Yamaha part numbers are shown only as reference numbers for identification and compatibility checking.
Does the kit include the housing?
Yes. The listing contents include a water pump housing together with the impeller, plates, seals, key, pins, bolts, and other service components shown above.
Can I use this kit on every Yamaha F15 or F20?
No. Model families can use different pump-kit revisions depending on year and configuration. Confirm the exact model suffix, year, serial range, and part number before purchase.
When should the water pump be serviced?
Follow the maintenance schedule for your exact outboard and inspect the pump whenever cooling performance declines or the lower unit is removed. Frequent operation in sandy, silty, or abrasive water may require more frequent inspection.
Safety Information
- Verify the engine model, year, serial range, and original part number before installation.
- Do not operate the engine without a proper water supply.
- Use the service manual for model-specific torque values and lower-unit alignment procedures.
- Professional installation is recommended if you are not experienced with outboard lower-unit service.
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