Water Pump Impeller for Yamaha 20D & 25N 2-Stroke and F20 & F25 4-Stroke Outboards – Replaces 6L2-44352-00
Water Pump Impeller for Yamaha 20D & 25N 2-Stroke and F20 & F25 4-Stroke Outboards – Replaces 6L2-44352-00 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller for Yamaha 20D & 25N 2-Stroke and F20 &...
Water Pump Impeller for Yamaha 20D & 25N 2-Stroke and F20 & F25 4-Stroke Outboards – Replaces 6L2-44352-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for the cooling systems of selected Yamaha outboard motors, including Yamaha 20D and 25N 2-stroke models and Yamaha F20 and F25 4-stroke models. It replaces the Yamaha OEM impeller reference 6L2-44352-00; the full OEM format 6L2-44352-00-00 is also used in application references.
The impeller helps maintain the water flow required for proper outboard cooling. Confirm your exact engine model and compare the original impeller and water-pump assembly before ordering.
- Direct replacement-style water pump impeller for selected Yamaha outboards.
- Applicable to the Yamaha 20D and 25N 2-stroke models listed below.
- Applicable to the Yamaha F20 and F25 4-stroke models listed below.
- Installation requires access to the water pump and normally involves lower-unit removal.
Part Number Matrix
These are manufacturer and aftermarket reference numbers associated with this impeller. Part-number references do not replace checking the complete engine application.
| Brand or Reference Type | Part Number |
|---|---|
| Yamaha OEM | 6L2-44352-00 |
| Yamaha OEM full format | 6L2-44352-00-00 |
| Sierra Marine | 18-3065 |
| Mallory Marine | 9-45613 |
| Additional company-listed reference | 8M6014000 |
| Additional company-listed reference | 8M6010333 |
Engine Compatibility
The company application records for this impeller identify the following Yamaha model groups. Model, horsepower, stroke, and serial-number conditions should be checked together before purchase.
| Brand | Model | Rated HP | Stroke | OEM Reference | Application Note |
|---|---|---|---|---|---|
| Yamaha | 20D | 20 | 2-Stroke | 6L2-44352-00 | Verify the complete model designation and serial number. |
| Yamaha | 25N | 25 | 2-Stroke | 6L2-44352-00 | Verify the complete model designation and serial number. |
| Yamaha | F20 | 20 | 4-Stroke | 6L2-44352-00-00 | Verify the complete model designation and serial number. |
| Yamaha | F25 | 25 | 4-Stroke | 6L2-44352-00-00 | Verify the complete model designation and serial number. |
Do not rely on horsepower alone. Yamaha model suffixes, production details, and serial-number ranges can affect fitment.
Technical Specifications
- Product Type
- Water pump impeller
- Application
- Selected Yamaha outboard water-pump cooling systems
- Compatible Stroke Types
- 2-stroke and 4-stroke applications as listed in the compatibility table
- Installation
- Replacement installation normally requires removal of the lower unit and water-pump housing
- Primary OEM Reference
- 6L2-44352-00
- Alternate Full OEM Format
- 6L2-44352-00-00
What's in the Box
- 1 x Water pump impeller
This listing is for the impeller only. A water-pump housing, wear plate, O-ring, key, gasket, or complete repair kit is not included unless specifically stated in the order options.
Installation Notes
Installation requires mechanical proficiency and normally involves removing the outboard lower unit. Remove the water-pump housing, take out the old impeller, and clean the housing and mating surfaces before installation. Install the replacement impeller in the correct orientation for the engine's water-pump design, then reassemble the housing and lower unit using the manufacturer's service procedures and torque specifications.
After installation, run the engine in an appropriate test environment and confirm that cooling-water flow is present. Stop the engine immediately if the tell-tale stream is weak or absent, or if an overheating warning occurs.
Troubleshooting & FAQ
How do I confirm that this impeller fits my Yamaha outboard?
Check the complete engine model, horsepower, stroke type, and serial number against the compatibility information. This listing is identified for Yamaha 20D and 25N 2-stroke models and Yamaha F20 and F25 4-stroke models. Also compare the old impeller and water-pump components before installation.
What are the signs of a worn water pump impeller?
Common signs include a weak or missing tell-tale stream, an overheating warning, reduced cooling-water flow, or visibly cracked, hardened, or damaged impeller vanes. Inspect the water-pump components whenever the lower unit is serviced.
Does this listing include a key, O-ring, or gasket?
No. This listing is for one impeller only. Keys, O-rings, gaskets, housings, wear plates, and other water-pump components are not included unless explicitly shown in the selected product option.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller intended for the listed applications. Yamaha OEM and aftermarket reference numbers are provided for identification and fitment comparison only.
How often should I replace the impeller?
Replacement intervals depend on operating conditions, service history, and the engine manufacturer's maintenance schedule. Inspect the impeller regularly and replace it if the vanes are worn, brittle, cracked, or deformed.
What should I do if the reference number matches but the part looks different?
Do not install the part based on the number alone. Compare the impeller dimensions, vane design, keyway, and water-pump assembly with your original component, and confirm the complete engine application before purchase.
Safety & Important Information
- Verify the complete engine model, stroke type, horsepower, and serial number before ordering.
- Part-number references are provided for identification and should be checked against the complete application.
- Use proper service procedures and manufacturer torque specifications during installation.
- Professional installation is recommended if you are not experienced with outboard lower-unit service.
- This is an aftermarket replacement, not an OEM Yamaha component.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for common marine service applications.
- Application-Focused Listings — Product references and compatibility information are provided to help with part identification.
- Customer Support — Contact support with your engine model and reference details if you need help confirming an application.
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