Water Pump Repair Kit Without Housing for Yamaha F40 4-Stroke Outboards, 2010–2023 (Replaces 6BG-W0078-00-00 and 6BG-W0078-01-00)
Water Pump Repair Kit Without Housing for Yamaha F40 4-Stroke Outboards, 2010–2023 (Replaces 6BG-W0078-00-00 and 6BG-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 Repair Kit Without Housing for Yamaha F40 4-Stroke Outbo...
Water Pump Repair Kit Without Housing for Yamaha F40 4-Stroke Outboards, 2010–2023 (Replaces 6BG-W0078-00-00 and 6BG-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump repair kit without housing is intended for Yamaha F40 4-stroke outboards from model years 2010 through 2023. It is designed for water pump service when the existing pump housing is suitable for reuse.
The kit is associated with Yamaha reference numbers 6BG-W0078-00-00 and 6BG-W0078-01-00. The aftermarket reference for this service kit is 18-3490.
- Water pump service kit for Yamaha F40 4-stroke outboards.
- Housing is not included.
- Use the existing housing only after checking it for wear, scoring, corrosion, distortion, and other damage.
- Confirm the exact engine model and year before ordering.
Part Number Matrix
These references identify the water pump repair kit application. They are provided for cross-reference and should be checked against the engine model and year.
| Brand | Reference Type | Part Number | Notes |
|---|---|---|---|
| Yamaha | OEM reference | 6BG-W0078-00-00 | Water pump repair kit reference |
| Yamaha | OEM reference | 6BG-W0078-01-00 | Water pump repair kit reference |
| Aftermarket | Cross-reference | 18-3490 | Aftermarket service-kit reference |
Engine & Model Compatibility
The company application for this product is limited to Yamaha F40 4-stroke outboards, model years 2010–2023. Exact model codes, shaft length, serial range, and lower-unit configuration may affect compatibility, so compare your engine identification information with the applicable parts diagram before installation.
| Brand | Engine Family | Rated HP | Stroke | Model Years | OEM References | Housing |
|---|---|---|---|---|---|---|
| Yamaha | F40 | 40 HP | 4-Stroke | 2010–2023 | 6BG-W0078-00-00; 6BG-W0078-01-00 | Not included |
Not confirmed for Yamaha F30, Yamaha 2-stroke models, or other engine families. Do not rely on horsepower alone; verify the complete model designation and year.
Technical Specs
- Product Type
- Water pump repair kit
- Application
- Yamaha F40 4-stroke outboards, 2010–2023
- Housing
- Not included; existing housing is reused if serviceable
- Product Status
- Aftermarket replacement
What’s in the Box
This listing is for a water pump repair kit supplied without the pump housing. The pump housing must be reused if it passes inspection or sourced separately when replacement is required. Because component configurations can vary by production batch and application, compare the supplied parts with the applicable service diagram before beginning installation.
- Water pump repair-service components for the stated Yamaha F40 4-stroke application
- Pump housing: not included
Installation Notes
- Confirm the engine is a Yamaha F40 4-stroke model from 2010–2023 and disconnect the battery before service.
- Remove the lower unit according to the engine manufacturer's service procedure.
- Remove the existing water pump components and inspect the housing, wear surfaces, water passages, and related hardware.
- Do not reuse a housing that is excessively worn, scored, corroded, distorted, or otherwise damaged.
- Clean the mating and sealing surfaces before installing the replacement service components.
- Install the components in the correct order and orientation, using the applicable service manual for torque values and sealing requirements.
- Reinstall the lower unit and confirm that the driveshaft, water tube, and shift mechanism are correctly aligned.
- Run the engine only in an appropriate water source or with the correct flushing equipment, and confirm a steady cooling-water tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
This kit is specified for Yamaha F40 4-stroke outboards from 2010–2023. Verify the complete model designation and year before ordering. It is not confirmed here for F30, 2-stroke, or other Yamaha applications.
Does the kit include the water pump housing?
No. This product is the water pump repair kit without housing. Inspect your existing housing and replace it separately if it is worn or damaged.
What are the signs of a failing water pump?
Common symptoms can include a weak or intermittent tell-tale stream, an overheating warning, reduced cooling-water flow, or visible damage to the impeller and related pump components. Shut the engine down if overheating occurs and investigate before further operation.
Can I reuse my existing housing?
The existing housing may be reused only if it is in serviceable condition. Check for grooves, scoring, corrosion, distortion, and excessive wear before assembly.
Is this an OEM part?
No. This is an aftermarket replacement service kit. Yamaha reference numbers are provided for application and cross-reference purposes only.
Are the Yamaha reference numbers interchangeable for every model?
The listed references are associated with this product, but compatibility still depends on the complete engine model and year. Confirm the application before purchase rather than matching a number alone.
Safety & Important Information
- Verify the complete engine model, year, and applicable parts diagram before ordering.
- This kit does not include the pump housing.
- Follow the manufacturer's service procedures and torque specifications during installation.
- Professional installation is recommended if you are not familiar with lower-unit or water-pump service.
- Never operate an outboard without an adequate water supply for cooling.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for routine service and repair.
- Application-Focused Listings — Product descriptions identify the supported engine family and important exclusions.
- Service Support — Check the engine identification information and parts diagram before installation.
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