Water Pump Impeller – Fits Yamaha 2.5HP & 3HP Outboards (Replaces 6L5-44352-00-00)
Water Pump Impeller – Fits Yamaha 2.5HP & 3HP Outboards (Replaces 6L5-44352-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This aftermarket Water Pump Impeller – Fits Yamaha 2.5HP & 3HP Outboards (Replaces 6L5-44352-00-00) is engineered for a precise fit on Yamaha 2.5HP & 3HP 4-Stroke outboards (2003–2022) and 3HP 2-Stroke outboards (1988–2002). It serves as a vital component of the engine's cooling system, ensuring a consistent flow of coolant to prevent overheating.
It is a direct replacement for Yamaha part number 6L5-44352-00-00 and interchanges with Sierra 18-8911, Mallory Marine 9-45615, and CEF 500322.
- Direct replacement for a hassle-free installation.
- Constructed from durable neoprene rubber with a hardened nylon core.
- Restores cooling performance to protect your engine from damage.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6L5-44352-00-00 |
| Yamaha | 6L5-44352-00 |
| Sierra | 18-8911 |
| Mallory Marine | 9-45615 |
| CEF | 500322 |
| MARKGOO | OEM equivalent |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller fits a wide range of Yamaha 2.5HP four-stroke models from 2003 to 2022 and 3HP two-stroke models from 1988 to 2002.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F2.5A | 2.5 | 4-Stroke | 2003–2022 | 6L5-44352-00-00 | |
| Yamaha | F2.5B | 2.5 | 4-Stroke | 2003–2022 | 6L5-44352-00-00 | |
| Yamaha | F2.5LMHA | 2.5 | 4-Stroke | 2013–2015 | 6L5-44352-00-00 | |
| Yamaha | F2.5LMHB | 2.5 | 4-Stroke | 2015–2022 | 6L5-44352-00-00 | |
| Yamaha | F2.5MSHB | 2.5 | 4-Stroke | 2003 | 6L5-44352-00-00 | |
| Yamaha | F2.5MSHC | 2.5 | 4-Stroke | 2004 | 6L5-44352-00-00 | |
| Yamaha | F2.5MSH | 2.5 | 4-Stroke | 2005–2010 | 6L5-44352-00-00 | |
| Yamaha | F2.5MSHD | 2.5 | 4-Stroke | 2005 | 6L5-44352-00-00 | |
| Yamaha | F2.5SMHA | 2.5 | 4-Stroke | 2011–2015 | 6L5-44352-00-00 | |
| Yamaha | F2.5SMHB | 2.5 | 4-Stroke | 2015–2022 | 6L5-44352-00-00 | |
| Yamaha | 3A | 3 | 2-Stroke | 1988–2002 | 6L5-44352-00-00 | |
| Yamaha | 3LF, 3LG | 3 | 2-Stroke | 1988–1989 | 6L5-44352-00-00 | |
| Yamaha | 3LD, 3SD | 3 | 2-Stroke | 1990 | 6L5-44352-00-00 | |
| Yamaha | 3MLHP, 3MSHP | 3 | 2-Stroke | 1991 | 6L5-44352-00-00 | |
| Yamaha | 3MLHQ, 3MSHQ | 3 | 2-Stroke | 1992 | 6L5-44352-00-00 | |
| Yamaha | 3MLHR, 3MSHR | 3 | 2-Stroke | 1993 | 6L5-44352-00-00 | |
| Yamaha | 3MLHS, 3MSHS | 3 | 2-Stroke | 1994 | 6L5-44352-00-00 | |
| Yamaha | 3MLHT, 3MSHT | 3 | 2-Stroke | 1995 | 6L5-44352-00-00 | |
| Yamaha | 3MLHU, 3MSHU | 3 | 2-Stroke | 1996 | 6L5-44352-00-00 | |
| Yamaha | 3MLHV, 3MSHV | 3 | 2-Stroke | 1997 | 6L5-44352-00-00 | |
| Yamaha | 3MLHW, 3MSHW | 3 | 2-Stroke | 1998 | 6L5-44352-00-00 | |
| Yamaha | 3MLHX, 3MSHX | 3 | 2-Stroke | 1999 | 6L5-44352-00-00 | |
| Yamaha | 3MLHY, 3MSHY | 3 | 2-Stroke | 2000 | 6L5-44352-00-00 | |
| Yamaha | 3MSHZ, 3MSHKZ | 3 | 2-Stroke | 2001 | 6L5-44352-00-00 | |
| Yamaha | 3MSHA | 3 | 2-Stroke | 2002 | 6L5-44352-00-00 | |
| Yamaha | Malta | 3 | 2-Stroke | 1988–2002 | 6L5-44352-00-00 | |
| Yamaha | 3SF, 3SG | 3 | 2-Stroke | 1988–1989 | 6L5-44352-00-00 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Housing Material
- Neoprene rubber with hardened nylon core
- Dimensions
- 36.0 mm diameter × 14.5 mm thickness
- Shaft Size
- 9.9 mm inner diameter
- Number of Blades
- 6
- Weight
- 0.04 lb (18.1 g)
What’s in the Box
- 1 x Water Pump Impeller (Replaces 6L5-44352-00-00)
Installation Notes
- Disconnect the battery and ignition safety lanyard.
- Place the outboard in neutral and remove the lower unit mounting bolts.
- Carefully separate the lower unit (gearcase) from the upper section.
- Unbolt and remove the water pump housing to access the old impeller.
- Clean the housing interior and inspect for wear or damage.
- Install the new impeller, ensuring the blades are oriented correctly (typically clockwise).
- Reassemble the pump housing, apply sealant to bolts if required, and torque to spec.
- Reinstall the lower unit, ensuring all shafts and tubes align properly.
- Start the engine in water and verify a steady stream of water from the tell-tale port.
Troubleshooting & FAQ
How do I know if this impeller fits my Yamaha outboard?
This impeller is designed for specific Yamaha 2.5HP and 3HP models listed in the compatibility table. The best way to confirm fitment is to check your engine's model and serial number against the list provided. If you are unsure, check your service manual or contact us with your engine details.
What are the signs of a failing water pump impeller?
Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. The rubber blades can become brittle, cracked, or worn over time, reducing their ability to pump water effectively.
How often should I replace the impeller?
While no official interval is provided, a general best practice is to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, especially if operating in saltwater or sandy conditions. Proactive replacement prevents unexpected engine overheating.
Is there a difference in height between this and the OEM part?
Our specification is 14.5 mm, compiled from multiple aftermarket sources for a precise seal. Some sources may report a slightly different OEM height (e.g., 14.32 mm), but this minor variance is within manufacturing tolerances and does not affect performance or fit in the designated pump housings.
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.
Payment & Security
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