Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke (Replaces 6G0-44352-00-00)
Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke (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
Delivery and Shipping
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Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke (Replaces 6G0-...
Water Pump Impeller – Fits Yamaha 20HP/25HP 2-Stroke (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 – Fits Yamaha 20HP/25HP 2-Stroke Outboards, specifically designed for Yamaha 20HP (20A, 20B series) and 25HP (25A series) models. It serves as a crucial component of the engine cooling system, ensuring optimal performance and preventing overheating.
It is a direct replacement for Yamaha OEM part numbers 6G0-44352-00-00, 656-44352-00, 6G0-44352-03, and 94-44352-00, providing an exact interchange for a hassle-free installation.
- Engineered for a direct fit with an included key.
- Constructed from durable neoprene rubber with a chemical-resistant plastic hub.
- Meets or exceeds OEM specifications for cooling performance and longevity.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6G0-44352-00-00 |
| Yamaha | 656-44352-00 |
| Yamaha | 6G0-44352-03 |
| Yamaha | 94-44352-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, please verify your engine series (e.g., 20A, 25A) and check our technical specifications against your existing part, as year ranges can vary.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct fit with key
- Outer Diameter
- 69.08 mm (2.72")
- Height
- 13.08 mm (0.515")
- Internal Shaft Insert Diameter
- 13.72 mm (0.54")
- Blade Count
- 6
- Weight
- 15 g (0.033 lbs)
- Material
- Neoprene/Rubber with Plastic Hub
- Condition
- New
What’s in the Box
- 1 x Water Pump Impeller (replaces 6G0-44352-00-00)
Installation Notes
- Disconnect the spark plug leads and battery for safety.
- Place a drain pan and remove the gearcase drain screw to empty the lower unit oil.
- Remove the bolts securing the lower unit (gearcase) to the engine and carefully lower it.
- Unbolt and remove the water pump housing cover. Note the rotational direction of the old impeller blades.
- Slide the old impeller off the driveshaft, removing the old key.
- Clean the housing and base plate, inspecting for wear or damage.
- Install the new key and slide the new impeller onto the driveshaft, turning the shaft clockwise to bed the blades.
- Reassemble the pump housing with new gaskets and specified torque.
- Reinstall the lower unit, ensuring the water tube and shift shaft align correctly.
- Refill the gearcase with fresh lubricant before starting the engine.
- Reconnect the battery and test the engine using a water supply (flushing muffs), confirming a strong tell-tale stream.
Troubleshooting & FAQ
How do I ensure this impeller fits my exact Yamaha model?
This impeller is designed for specific Yamaha 20HP (20A, 20B series) and 25HP (25A series) 2-stroke models. The most reliable method is to compare the specifications—especially the outer diameter (69.08 mm), height (13.08 mm), and internal shaft diameter (13.72 mm)—against your original part before ordering.
What are the signs of a failing water pump impeller?
Key indicators include a weak or non-existent water stream from the 'tell-tale' outlet, engine overheating alarms, and in severe cases, steam from the exhaust. Reduced engine performance at high RPMs can also signal a cooling problem.
How often should I replace my outboard's impeller?
As a general maintenance rule, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you operate frequently in sandy, silty, or saltwater conditions.
Does this impeller come with the required key for installation?
Yes, this impeller is designed for a direct fit and includes the necessary key for installation on the driveshaft.
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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