Water Pump Impeller for Yamaha 3HP 3A Malta 2-Stroke and F2.5 4-Stroke Outboards – Replaces 6L5-44352-00, 18-8911
Water Pump Impeller for Yamaha 3HP 3A Malta 2-Stroke and F2.5 4-Stroke Outboards – Replaces 6L5-44352-00, 18-8911 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 for Yamaha 3HP 3A Malta 2-Stroke and F2.5 4-Str...
Water Pump Impeller for Yamaha 3HP 3A Malta 2-Stroke and F2.5 4-Stroke Outboards – Replaces 6L5-44352-00, 18-8911 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for selected Yamaha outboard applications, including Yamaha 3HP 3A Malta 2-stroke models and Yamaha F2.5 4-stroke models. It replaces the Yamaha reference 6L5-44352-00 and is also listed as an aftermarket replacement for 18-8911.
The impeller is supplied as a single replacement component for the outboard water pump. It is intended to restore water-pump circulation and help maintain proper engine cooling when the original impeller is worn, cracked, brittle, or deformed.
- Direct replacement water pump impeller for selected Yamaha outboards.
- Applicable to both specified 2-stroke and 4-stroke Yamaha applications listed below.
- Single impeller component; no drive pin, gasket, or water-pump repair kit is included unless separately stated.
Part Number References
Use the following references to compare the replacement part with your original impeller before ordering.
| Reference Type | Part Number |
|---|---|
| Yamaha reference | 6L5-44352-00 |
| Yamaha reference format | 6L5-44352-00-00 |
| Aftermarket reference | 18-8911 |
Engine & Model Compatibility
Compatibility is limited to the applications identified by the product records. Confirm the complete model designation and year of your outboard before ordering. Do not rely on horsepower alone.
| Brand | Application | Rated HP | Stroke | Year Range | Reference Number |
|---|---|---|---|---|---|
| Yamaha | 3A Malta | 3 HP | 2-Stroke | 1988–2002 | 6L5-44352-00 |
| Yamaha | F2.5 / F2.5A / F2.5B | 2.5 HP | 4-Stroke | 2003–2012 | 6L5-44352-00-00 |
Technical Information
- Product Type
- Water pump impeller
- Part Configuration
- Single replacement impeller
- Installation
- Direct replacement for the matching original impeller
- Brand Application
- Yamaha outboard
- Applicable Strokes
- Specified 2-stroke and 4-stroke applications shown in the compatibility table
- Yamaha Reference
- 6L5-44352-00 / 6L5-44352-00-00
- Aftermarket Reference
- 18-8911
What’s in the Box
- 1 x Water pump impeller
A drive pin, gasket, wear plate, water-pump housing, and complete repair kit are not included with this single impeller listing.
Installation Notes
- Turn off the engine and follow the safety procedures in the outboard service manual.
- Remove the lower unit and water-pump housing according to the manufacturer's instructions.
- Remove the old impeller and inspect the housing, wear plate, seals, and drive-pin or key area for damage or excessive wear.
- Clean the pump housing and mating surfaces before installing the replacement impeller.
- Install the impeller in the correct orientation for the pump housing and reinstall the housing using the manufacturer's specified procedures.
- Reinstall the lower unit and test the cooling-water flow in a suitable water supply.
- Stop the engine immediately if the tell-tale flow 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 exact model designation, stroke type, and year against the compatibility table. This listing is for the specified Yamaha 3A Malta 3HP 2-stroke applications from 1988–2002 and F2.5, F2.5A, and F2.5B 2.5HP 4-stroke applications from 2003–2012. If your model or year is different, compare the original impeller and consult the appropriate parts diagram before ordering.
What are the signs of a worn water-pump impeller?
Common signs include weak or interrupted tell-tale water flow, overheating warnings, reduced cooling performance, and blades that are cracked, brittle, permanently bent, or missing during inspection.
Does this listing include a drive pin or gasket?
No. This listing contains one replacement impeller only. A drive pin, gasket, wear plate, and other water-pump components are not included.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller listed for the Yamaha reference numbers shown above. Yamaha and other brand names and part numbers are used only to identify application and replacement references.
How often should the impeller be replaced?
Inspect the impeller at the interval recommended in your engine service manual and whenever cooling performance changes. Replacement timing depends on operating hours, storage, water conditions, and the condition of the impeller.
Can I install the impeller without removing the lower unit?
Water-pump access varies by model, but these applications normally require lower-unit and pump-housing removal. Follow the service manual for the exact procedure and tightening specifications.
Safety & Important Information
- Verify the exact model, year, stroke type, and original part number before ordering.
- Do not operate the outboard if the cooling-water stream is weak or absent.
- Inspect the water-pump housing and related components before installation; replace damaged parts as required.
- This is an aftermarket replacement component, not an OEM Yamaha component.
- Professional installation is recommended when lower-unit or water-pump service is unfamiliar.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for common outboard service needs.
- Application-Focused Listings — Compatibility information is organized by model, horsepower, stroke, and year where available.
- Support for Maintenance Projects — Replacement parts intended to help keep marine engines serviceable and ready for use.
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