Water Pump Repair Kit Without Housing for Yamaha 2-Stroke Outboards – Replaces 692-W0078-02, Sierra 18-3370
Water Pump Repair Kit Without Housing for Yamaha 2-Stroke Outboards – Replaces 692-W0078-02, Sierra 18-3370 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit Without Housing for Yamaha 2-Stroke Outboards...
Water Pump Repair Kit Without Housing for Yamaha 2-Stroke Outboards – Replaces 692-W0078-02, Sierra 18-3370 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump repair kit without housing is designed for selected Yamaha 2-stroke outboards. It is intended to renew the serviceable water-pump components while reusing the existing pump housing when that housing is in suitable condition.
The kit is listed for Yamaha water-pump applications associated with OEM reference 692-W0078-02 and aftermarket reference Sierra 18-3370. The housing is not included. Inspect your original housing, cover, and mating surfaces before installation and replace any worn or damaged housing separately.
- Water pump service kit for Yamaha 2-stroke outboards.
- Without water-pump housing; reuses the existing housing when serviceable.
- Aftermarket replacement for the listed Yamaha and Sierra references.
- Confirm the exact engine model, year, and existing part number before ordering.
Part Number Matrix
These are the customer-facing manufacturer and aftermarket references associated with this service-kit application. They should not be treated as interchangeable with complete kits that include a housing.
| Brand | Reference | Application note |
|---|---|---|
| Yamaha | 692-W0078-02 | Primary OEM reference listed for this product |
| Sierra | 18-3370 | Aftermarket reference for a water-pump kit without housing |
Engine & Model Compatibility
The company fitment data lists the following Yamaha 2-stroke application groups. Model suffixes, shaft configuration, production year, and serial-number breaks can affect fitment, so verify the complete model designation against your service manual before installation.
| Brand | Model or horsepower group | Stroke | Years listed | Reference |
|---|---|---|---|---|
| Yamaha | 60 HP, 70 HP | 2-Stroke | 2004–2023 | 692-W0078-02 |
| Yamaha | C75, P75, C80, 90, B90, C90 | 2-Stroke | 1997–2023 | 692-W0078-02 |
| Yamaha | E75 | 2-Stroke | 1995–1996; also listed in the broader company application data | 692-W0078-02 |
| Yamaha | C85 | 2-Stroke | 1991–1996 | 692-W0078-02 |
| Yamaha | CV85 | 2-Stroke | 1989–1990 | 692-W0078-02 |
| Yamaha | 90 HP | 2-Stroke | 1984–1991 | 692-W0078-02 |
| Yamaha | P75 | 2-Stroke | 1996 | 692-W0078-02 |
| Yamaha | C75 | 2-Stroke | 1994–1996 | 692-W0078-02 |
Technical Specs
- Product Type
- Water pump repair kit
- Housing
- Not included; service kit is supplied without water-pump housing
- Engine Type
- Yamaha 2-stroke outboards
- Primary OEM Reference
- 692-W0078-02
- Aftermarket Reference
- Sierra 18-3370
- Installation
- Professional installation is recommended; reuse the original housing only if it passes inspection
What’s in the Box
This listing is for the water-pump service kit without housing. The company record does not provide a verified component-by-component quantity list for this exact product. Do not assume that a complete water-pump housing, housing cover, or other unlisted hardware is included.
- Water-pump repair-kit components as supplied for the listed application
- Water-pump housing not included
Installation Notes
Use the service procedure and torque specifications in the engine manufacturer’s workshop manual for your exact model.
- Confirm the engine model, year, stroke, and existing water-pump reference before disassembly.
- Remove the lower unit according to the manufacturer’s procedure.
- Remove the existing water-pump service components and carefully clean the mating surfaces.
- Inspect the original housing, cover, keyway, driveshaft area, and water tube for wear, scoring, corrosion, or deformation.
- Do not reuse a damaged housing. This kit does not include a replacement housing.
- Install the new service-kit components in the correct orientation, using the workshop manual for assembly details and torque values.
- Reinstall the lower unit, refill gear lubricant if required by the service procedure, and check for proper cooling-water flow.
- Run the engine safely and verify a steady tell-tale stream before returning it to service.
Troubleshooting & FAQ
How can I confirm this kit fits my engine?
Match the full model designation, horsepower, stroke, year, and any serial-number condition to the compatibility information and your service manual. The OEM reference 692-W0078-02 and aftermarket reference Sierra 18-3370 are useful cross-checks, but the exact engine model remains the final fitment check.
Does this kit include the water-pump housing?
No. This product is the repair-kit version without housing. The existing housing must be reusable or replaced separately.
What are common signs of water-pump service being needed?
A weak or intermittent tell-tale stream, overheating warning, or reduced cooling performance can indicate a water-pump problem. Stop operation if the engine overheats and inspect the cooling system promptly.
Can I install this kit without checking the old housing?
No. Because the housing is not included, inspect it for scoring, corrosion, distortion, and excessive wear before installing the service-kit components.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement associated with Yamaha OEM reference 692-W0078-02 and aftermarket reference Sierra 18-3370. Yamaha and Sierra are referenced only for identification and fitment comparison.
Safety & Important Information
- Verify the complete engine model and year before ordering.
- Compare the replacement components with the original parts before installation.
- The water-pump housing is not included.
- Follow the engine manufacturer’s service manual for disassembly, torque, lubrication, and testing procedures.
- Professional installation is recommended.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket service components for common marine maintenance applications.
- Fitment-Focused Listings — Product references and application information are provided to support careful model verification.
- Service Support — Always use the manufacturer’s service information for installation and final compatibility confirmation.
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