Water Pump Impeller for Yamaha 3HP 2-Stroke & F2.5 4-Stroke Outboards (Replaces 6L5-44352-00-00)
Water Pump Impeller for Yamaha 3HP 2-Stroke & F2.5 4-Stroke Outboards (Replaces 6L5-44352-00-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Water Pump Impeller for Yamaha 3HP 2-Stroke & F2.5 4-Stroke Out...
Water Pump Impeller for Yamaha 3HP 2-Stroke & F2.5 4-Stroke Outboards (Replaces 6L5-44352-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller for Yamaha 3HP 2-Stroke & F2.5 4-Stroke Outboards is an aftermarket replacement impeller for the marine water-cooling system. It replaces Yamaha part number 6L5-44352-00-00 and is listed for Yamaha 3HP two-stroke models from 1988–2002 and Yamaha F2.5 four-stroke models from 2003–2018 in the referenced application data. Confirm your exact engine model, year, and original part number before ordering.
The impeller is also cross-referenced with Sierra 18-8911. The Sierra catalog identifies 18-8911 as an impeller replacing Yamaha 6L5-44352-00-00.
- Replacement water-pump impeller for Yamaha outboard cooling systems.
- Designed as an aftermarket replacement for the listed applications.
- Flexible rubber construction for use in marine water-cooling service.
- Confirm fitment by model, year, and part number before installation.
Part Number Matrix
Use the following verified reference to compare the replacement part with the original application.
| Brand | Part Number | Role |
|---|---|---|
| Yamaha | 6L5-44352-00-00 | Original equipment reference |
| Sierra | 18-8911 | Aftermarket interchange reference |
Engine & Model Compatibility
Fitment is based on catalog applications for Yamaha engines using the 6L5-44352-00-00 impeller reference. Model designations and production years can vary by market, so verify the complete engine identification before purchase.
| Brand | Model / Application | Rated HP | Stroke | Years | Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 3HP models including 3LG, 3SG, 3LF, 3SF, 3LD, 3MLHP, 3MSHP, 3SD, 3MLHQ, 3MSHQ, 3MLHR, 3MSHR, 3MLHS, 3MSHS, 3MLHT, 3MSHT, 3MLHU, 3MSHU, 3MLHV, 3MSHV, 3MLHW, 3MSHW, 3MLHX, 3MSHX, 3MLHY, 3MSHY, 3MSHKZ, 3MSHZ, and 3MSHA | 3 | 2-Stroke | 1988–2002 | 6L5-44352-00-00 | Catalog-listed applications; verify the exact model code. |
| Yamaha | F2.5 models, including F2.5MSHB, F2.5MSHC, F2.5MSHD, F2.5MSH, F2.5SMHA, F2.5LMHA, F2.5SMHA, and F2.5LMHB | 2.5 | 4-Stroke | 2003–2018 | 6L5-44352-00-00 | Application data includes F2.5 models through the 2016–2018 range; verify model suffix and year. |
Technical Specs
- Product Type
- Water pump impeller
- Installation
- Aftermarket replacement for the listed applications
- Number of Blades
- 6
- Material
- Rubber
- Dimensions
- Diameter 35.31–36 mm × height 14.32–15 mm; shaft diameter 9.9–10 mm
- Weight
- 8 g (0.28 oz)
- Application
- Outboard water-cooling systems
What’s in the Box
- 1 × Water pump impeller
No housing, wear plate, gasket, key, or other water-pump components are included unless specifically stated in the order details.
Installation Notes
- Stop the engine, disconnect the battery where applicable, shut off the fuel supply, and allow the engine to cool.
- Remove the lower unit or gearcase according to the engine manufacturer's service procedure.
- Remove the water-pump housing to expose the old impeller.
- Remove the old impeller and retain any serviceable drive key only if the engine procedure requires it.
- Clean debris from the housing, wear plate, and driveshaft. Inspect the housing and plate for grooves, distortion, or damage.
- Lightly wet or lubricate the new impeller with a water-compatible lubricant recommended for impeller installation.
- Install the impeller with the drive key correctly positioned and orient the blades according to the engine manufacturer's service instructions.
- Reinstall the water-pump housing and tighten its fasteners to the manufacturer's specification.
- Reattach the lower unit, restore the fuel and battery connections, and test the engine using the appropriate water supply. Confirm a steady tell-tale stream and check for overheating.
Troubleshooting & FAQ
How do I know if this impeller fits my Yamaha outboard?
Check that your engine is a listed Yamaha 3HP two-stroke model from 1988–2002 or a listed F2.5 four-stroke model from 2003–2018, and confirm that the original impeller reference is 6L5-44352-00-00 or the verified Sierra interchange is 18-8911. Model suffixes and year ranges may vary by market, so verify the complete identification before ordering.
What are the signs of a failing water-pump impeller?
Common signs include a weak or absent tell-tale stream, overheating, an overheating warning, or reduced cooling performance. Brittle, cracked, missing, or permanently deformed blades also indicate that replacement is needed.
How often should I replace my outboard's impeller?
Inspect the impeller during routine maintenance and replace it when the blades show wear, hardening, cracking, deformation, or damage. Replacement intervals depend on operating hours and water conditions; saltwater, sand, and silt can accelerate wear.
What's the difference between this impeller and the original Yamaha part?
This listing is for an aftermarket replacement, not a Yamaha-branded OEM component. It is intended to replace the listed original part number and provide compatible form and function when the application and dimensions are correctly matched.
Is this an OEM part?
No. This is an aftermarket replacement impeller. Yamaha 6L5-44352-00-00 and Sierra 18-8911 are reference numbers used for fitment comparison.
Does the package include a key or water-pump repair components?
No. The package contains one impeller only. A key, housing, cup, wear plate, gaskets, seals, and bolts are not included unless separately stated in the order details.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Coverage and return eligibility follow the applicable store warranty and return policies. Contact support with your order details if you receive a damaged, defective, or incorrect item.
Safety & Important Info
- Verify the engine model, year, stroke type, original part number, and impeller dimensions before purchase.
- Do not rely on horsepower alone to confirm fitment; model suffixes and production years must remain together.
- This is an aftermarket replacement, not an OEM component.
- Follow the engine manufacturer's service instructions and torque specifications.
- Professional installation is recommended if you are not familiar with lower-unit or water-pump service.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts selected for dependable fit and service in real-world conditions.
- Fast Global Fulfillment — Free standard delivery is available to most regions, with typical transit of 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising attention to materials and quality control.
Payment & Security
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