Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke Outboard Engines (Replaces 6G0-44352-00-00)
Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke Outboard Engines (Replaces 6G0-44352-00-00) 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 Impeller – Fits Yamaha 20HP/25HP 2-Stroke Outboard Engin...
Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke Outboard Engines (Replaces 6G0-44352-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This is a high-quality aftermarket Water Pump Impeller for Yamaha 20HP/25HP 2-Stroke Outboard Engines (Replaces 6G0-44352-00-00). It is designed for a precise fit on Yamaha's 20A, 20B, and 25A series two-stroke outboards, restoring cooling system performance and reliability.
It directly replaces Yamaha OEM part numbers 6G0-44352-00-00, 6G0-44352-03-00, and 656-44352-00-00, along with aftermarket equivalents.
- Installs in the lower unit water pump housing.
- Features a durable plastic hub with a keyed shaft design.
- Engineered with six flexible rubber blades for efficient water flow.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6G0-44352-00-00 |
| Yamaha | 6G0-44352-03-00 |
| Yamaha | 656-44352-00-00 |
| Aftermarket | 6G0-44352 |
| Aftermarket | 94-44352-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, it is critical to verify your engine's model and serial number to ensure correct fitment, as year ranges can vary.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | 20A Series | 20 | 2-Stroke | 6G0-44352-00-00 | Verify exact model years with engine serial number |
| Yamaha | 20B Series | 20 | 2-Stroke | 6G0-44352-00-00 | Verify exact model years with engine serial number |
| Yamaha | 25A Series | 25 | 2-Stroke | 6G0-44352-00-00 | Verify exact model years with engine serial number |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Lower Unit Casing Drive
- Connection
- Drive Shaft with Key Slot
- Housing Material
- Plastic Hub
- Housing Color
- Black
- Dimensions
- Outer Diameter: 69.08mm (2.72"), Height: 13.08mm (0.515"), Internal Shaft Diameter: 13.72mm (0.54")
- Weight
- 15g
- Fitting Type
- Internal Keyed Shaft
- Other Technical Attributes
- 6 Rubber Blades
What’s in the Box
- 1 x Water Pump Impeller (6G0-44352-00-00)
- 1 x Drive Key (Note: inclusion may vary)
Installation Notes
- Disconnect the spark plug wires and shift the outboard into neutral.
- Unbolt and carefully remove the lower unit from the engine's midsection.
- Remove the water pump housing bolts and slide the housing up off the drive shaft.
- Remove the old impeller, noting the direction of the blades.
- Clean any debris or corrosion from the housing interior and wear plate.
- Slide the new impeller onto the drive shaft, aligning the keyway with the new key.
- Turn the drive shaft clockwise while pushing down to bend the blades correctly inside the housing.
- Reinstall the water pump housing with a new gasket.
- Reattach the lower unit to the engine, ensuring the drive shaft and shift shafts align.
- Once fully assembled, test run the engine in water and confirm a steady stream from the tell-tale port.
Troubleshooting & FAQ
How do I know if this impeller fits my Yamaha 25HP?
This impeller is designed for 2-stroke Yamaha 25A series outboards. The most reliable way to confirm compatibility is to check your engine's model and serial number against your service manual's part requirements. If it calls for OEM part 6G0-44352-00-00, this part will fit.
What are the signs of a failing impeller?
Common signs include a weak or non-existent water stream from the engine's tell-tale outlet, engine overheating alarms, or a noticeable decrease in engine performance. A visual inspection may show cracked, brittle, or worn-down rubber blades.
How often should I replace my water pump impeller?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years, or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).
Can this be used on a 4-stroke engine?
No, this impeller is specifically designed for the 2-stroke Yamaha models listed. Using it in a 4-stroke engine is not recommended and will likely result in improper cooling and potential engine damage.
What is the difference between this and an OEM impeller?
This is an aftermarket part built to meet or exceed original equipment manufacturer (OEM) specifications. It offers comparable performance and material quality at a better value.
Is a key always included in the package?
While the impeller requires a key for installation, its inclusion in the package can vary. This listing includes a key, but it is always wise to retain your old one until the new part arrives and you can confirm.
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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