Water Pump Impeller – Fits Yamaha 2-2.5HP & 3HP (Replaces 6L5-44352-00, 18-8911, H/500322)
Water Pump Impeller – Fits Yamaha 2-2.5HP & 3HP (Replaces 6L5-44352-00, 18-8911, H/500322) 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 – Fits Yamaha 2-2.5HP & 3HP (Replaces 6L5-4...
Water Pump Impeller – Fits Yamaha 2-2.5HP & 3HP (Replaces 6L5-44352-00, 18-8911, H/500322) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Impeller – Fits Yamaha 2-2.5HP & 3HP Outboard Engines (Replaces 6L5-44352-00) is a crucial component for maintaining your engine's cooling system. It is designed for a precise fit on Yamaha 2-Stroke 3HP (1988–2002), 4-Stroke 2.5HP F2.5 (2003–2022), and various Parsun 2HP, 2.5HP, and 3HP outboard engines, including Malta models.
It serves as a direct replacement for several part numbers, including Yamaha 6L5-44352-00-00 and 6L5-44352-01-00, Sierra 18-8911, CEF 500322, and Mallory Marine 9-45615.
- Engineered for direct OEM-equivalent installation.
- Constructed from a tough, flexible neoprene compound for reliable performance.
- Suitable for both saltwater and freshwater environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6L5-44352-00-00 |
| Yamaha | 6L5-44352-01-00 |
| Sierra | 18-8911 |
| CEF | 500322 |
| Mallory Marine | 9-45615 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this part fits a wide range of 3A/Malta, F2.5A/B, and various 3HP models from 1988 through 2022. Please check your specific model code and year.
For Parsun owners, this part fits select 2HP, 2.5HP, and 3HP Malta-style models. Verify dimensions before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 3A/Malta | 3 | 2-Stroke | 1988–2002 | 6L5-44352-00-00 | |
| Yamaha | F2.5A | 2.5 | 4-Stroke | 2003–2021 | 6L5-44352-00-00 | Superseded by 6L5-44352-01-00 |
| Yamaha | F2.5B | 2.5 | 4-Stroke | 2021–2022 | 6L5-44352-01-00 | |
| Yamaha | 3SD | 3 | 2-Stroke | 1990 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3LD | 3 | 2-Stroke | 1990 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3LF | 3 | 2-Stroke | 1989 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3LG | 3 | 2-Stroke | 1988 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3SF | 3 | 2-Stroke | 1989 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3SG | 3 | 2-Stroke | 1988 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3MLHP | 3 | 2-Stroke | 1991 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3MLHQ | 3 | 2-Stroke | 1992 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3MLHR | 3 | 2-Stroke | 1993 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3MLHS | 3 | 2-Stroke | 1994 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | 3MSHA | 3 | 2-Stroke | 2002 | 6L5-44352-00-00 | Lower - Drive 1 |
| Yamaha | F2.5MSHC | 2.5 | 4-Stroke | 2004 | 6L5-44352-00-00 | Lower Casing Drive 1 |
| Yamaha | F2.5LMHB | 2.5 | 4-Stroke | 2015–2022 | 6L5-44352-00-00 | Lower Casing Drive 1 |
| Parsun | 2HP | 2 | 4-Stroke | Malta models | ||
| Parsun | 2.5HP | 2.5 | 4-Stroke | Malta models | ||
| Parsun | 3HP | 3 | 4-Stroke | Malta models |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM replacement
- Material
- Neoprene and hardened nylon
- Number of Blades
- 6
- Dimensions
- Hub Shaft Diameter: 9.9 mm (0.39 in), Overall Diameter: 36.0 mm (1.42 in), Impeller Height: 14.5 mm (0.57 in)
- Weight
- 10 g (0.35 oz)
- Other Technical Attributes
- Compatible with saltwater or freshwater applications
What’s in the Box
- 1 x Impeller (6L5-44352-00-00/6L5-44352-01-00)
Installation Notes
- Disconnect the spark plug lead to prevent accidental starting.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.
- Remove the bolts securing the lower unit (gearcase) to the upper leg of the outboard.
- Carefully lower and separate the gearcase from the driveshaft housing.
- Unscrew the bolts on the water pump housing and lift it to expose the old impeller.
- Note the rotational direction of the old impeller vanes before removing it.
- Slide the old impeller off the driveshaft, remove the Woodruff key, and clean the area.
- Install the new Woodruff key and slide the new impeller onto the shaft, rotating it in the correct direction to seat the vanes.
- Reinstall the water pump housing, reattach the gearcase to the upper leg, and refill with fresh gearcase oil.
- Reconnect the spark plug lead and test the engine in water to ensure proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my engine?
The best way to ensure fitment is to check your original part number against our Part Number Matrix. Additionally, cross-reference your engine's model, horsepower, and year with our compatibility table. When in doubt, message us with your engine's serial number.
What are the signs of a failing impeller?
Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and a noticeable decrease in engine performance. A brittle, cracked, or deformed impeller upon inspection confirms the need for replacement.
How often should I replace my water pump impeller?
As a best practice, impellers should be inspected annually and replaced every 1-2 years, or after every 100-200 hours of use, depending on operating conditions. Engines used in saltwater or sandy/murky water may require more frequent replacement.
Can I install this myself?
Yes, this is a common maintenance task for those with mechanical experience. However, it requires specific tools and care to properly drop the lower unit and reassemble everything correctly. If you are not confident, we recommend professional installation.
Is this impeller suitable for both saltwater and freshwater?
Yes, this impeller is manufactured with a durable, salt-resistant neoprene and nylon, making it fully compatible with both freshwater and saltwater applications.
What is the difference between an OEM and an aftermarket part?
This listing is an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to the same or higher specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
How fast is shipping?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free, and expedited options may be available at checkout.
What is your warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted for unused items in their original condition within our standard return window.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended to ensure safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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