Water Pump Impeller Kit – Fits Yamaha 60–90 HP 2-Stroke Outboards (Replaces 692-W0078-02-00)
Water Pump Impeller Kit – Fits Yamaha 60–90 HP 2-Stroke Outboards (Replaces 692-W0078-02-00) 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 Impeller Kit – Fits Yamaha 60–90 HP 2-Stroke Outboards (...
Water Pump Impeller Kit – Fits Yamaha 60–90 HP 2-Stroke Outboards (Replaces 692-W0078-02-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit provides the essential components for servicing the water pump on Yamaha 2-stroke outboard motors, covering models from 60 HP to 90 HP manufactured between 1984 and 2009. Engineered as a direct replacement, it restores cooling system efficiency to prevent overheating and ensure reliable engine performance.
It interchanges with Yamaha part numbers 692-W0078-00-00, 692-W0078-01-00, 692-W0078-02-00, and 692-W0078-A0-00, as well as Sierra equivalents 18-3370 and 18-3371 (kit with housing).
- Engineered for direct, hassle-free installation.
- Constructed with durable stainless steel and a neoprene rubber impeller for saltwater resilience.
- Kit includes a new impeller, pump cup, wear plate, gasket, key, and mounting hardware.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 692-W0078-00-00 | Superseded |
| Yamaha | 692-W0078-01-00 | Superseded |
| Yamaha | 692-W0078-A0-00 | Superseded |
| Yamaha | 692-W0078-02-00 | Current |
| Sierra | 18-3370 | |
| Sierra | 18-3371 | Includes housing |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for the specified Yamaha 2-stroke outboard models. Please verify your specific engine model and year range before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 60 | 60 | 2-Stroke | 2004–2005 | 692-W0078-02-00 | |
| Yamaha | 70 | 70 | 2-Stroke | 2004–2009 | 692-W0078-02-00 | |
| Yamaha | C75 | 75 | 2-Stroke | 1994–1999 | 692-W0078-02-00 | |
| Yamaha | E75 | 75 | 2-Stroke | 1995–2000 | 692-W0078-02-00 | |
| Yamaha | P75 | 75 | 2-Stroke | 1996–1999 | 692-W0078-02-00 | |
| Yamaha | C80 | 80 | 2-Stroke | 1997 | 692-W0078-02-00 | |
| Yamaha | C85 | 85 | 2-Stroke | 1989–1997 | 692-W0078-02-00 | |
| Yamaha | CV85 | 85 | 2-Stroke | 1989–1991 | 692-W0078-02-00 | |
| Yamaha | 90 | 90 | 2-Stroke | 1984–2009 | 692-W0078-02-00 | |
| Yamaha | C90 | 90 | 2-Stroke | 1997–2001 | 692-W0078-02-00 | |
| Yamaha | B90 | 90 | 2-Stroke | 1997–1999 | 692-W0078-02-00 |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Housing Material
- Stainless steel, neoprene rubber impeller
- Housing Color
- Black/metallic
- Warranty
- Varies by manufacturer (typically 1 year)
What’s in the Box
- 1 x Impeller
- 1 x Pump Cup
- 1 x Wear Plate
- 1 x Gasket
- 1 x O-ring
- 1 x Woodruff Key
- 4 x Bolts with Washers
Installation Notes
- Disconnect the battery and remove the engine cover.
- Locate the lower unit and drain the gear oil.
- Remove the bolts securing the lower unit to the engine's midsection and carefully lower it.
- Unbolt and remove the water pump housing to access the impeller.
- Inspect the housing for wear, cracks, or corrosion. Clean all surfaces thoroughly.
- Remove the old impeller, noting the direction of the vanes. Also, remove the old pump cup, wear plate, and gaskets.
- Install the new wear plate, pump cup, and Woodruff key on the driveshaft.
- Lightly lubricate the new impeller and slide it onto the driveshaft, rotating it in the direction of engine rotation to bend the vanes correctly.
- Reinstall the water pump housing with the new gasket and O-ring, torquing the bolts to the manufacturer's specification.
- Reattach the lower unit, refill with fresh gear oil, and reconnect the battery before testing.
Troubleshooting & FAQ
How do I know this kit will fit my engine?
This kit is designed for a specific range of Yamaha 2-stroke outboards (60–90 HP, years 1984–2009). The most reliable way to confirm fitment is to check your engine's model number and year against our compatibility table. You can also match the OEM part number (e.g., 692-W0078-02-00) from your service manual or existing part.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or non-existent "tell-tale" water stream, engine overheating alarms, steam from the exhaust, and reduced engine performance. If you notice any of these, inspect your water pump immediately.
How often should I replace my impeller?
As a general maintenance rule, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. Usage in saltwater or sandy/murky conditions may require more frequent replacement.
Is the housing included in this kit?
No, this is an impeller repair kit that includes the impeller and related wear items like the cup, plate, and gaskets. It reuses your existing water pump housing. If your housing is cracked, warped, or heavily corroded, it should be replaced separately.
What tool do I need to hold the driveshaft while removing the impeller nut?
You typically do not need a special tool to hold the driveshaft for impeller replacement. You can often shift the lower unit into forward gear to lock the driveshaft, preventing it from turning while you work on the water pump components.
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/specifications vs 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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