Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces Yamaha 6G1-44352-00, Mercury 47-11590M)
Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces Yamaha 6G1-44352-00, Mercury 47-11590M) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces ...
Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces Yamaha 6G1-44352-00, Mercury 47-11590M) is backordered and will ship as soon as it is back in stock.
Product Details
This is an aftermarket Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP (Replaces 6G1-44352-00). It is engineered for consistent performance in Yamaha 2-Stroke 6HP and 8HP outboards from 1984 to 2009, as well as select Mercury/Mariner 2-Stroke 6C, 6D, and 8C models.
It serves as a direct cross-reference for Yamaha 6G1-44352-00-00, 6G1-44352-01, and 6G1-44352-02; Mercury 47-11590M; Sierra 18-3066; CEF 500302; and Mallory 9-45610.
- Made from durable, corrosion-resistant neoprene rubber for longevity in marine environments.
- Engineered as a direct-fit replacement for the original OEM impeller.
- Includes one impeller, ensuring you have the core component for your water pump service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6G1-44352-00-00 |
| Yamaha | 6G1-44352-01 |
| Yamaha | 6G1-44352-02 |
| Mercury | 47-11590M |
| Sierra | 18-3066 |
| CEF | 500302 |
| Mallory | 9-45610 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this part fits a wide range of 6HP and 8HP two-stroke models manufactured between 1984 and 2009. Verify your specific model code and year for an exact match.
For Mercury/Mariner owners, this impeller fits specific 6HP (6C, 6D) and 8HP (8C) two-stroke models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 6HP (6LJ, 6SJ) | 6 | 2-Stroke | 1986 | 6G1-44352-00 |
| Yamaha | 6HP (6LH, 6SH) | 6 | 2-Stroke | 1987 | 6G1-44352-00 |
| Yamaha | 6HP (6LG, 6SG) | 6 | 2-Stroke | 1988 | 6G1-44352-00 |
| Yamaha | 6HP (6LF, 6SF) | 6 | 2-Stroke | 1989 | 6G1-44352-00 |
| Yamaha | 6HP (6LD, 6SD) | 6 | 2-Stroke | 1990 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHP, 6MSHP) | 6 | 2-Stroke | 1991 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHQ, 6MSHQ) | 6 | 2-Stroke | 1992 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHR, 6MSHR) | 6 | 2-Stroke | 1993 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHS, 6MSHS) | 6 | 2-Stroke | 1994 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHT, 6MSHT) | 6 | 2-Stroke | 1995 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHU, 6MSHU) | 6 | 2-Stroke | 1996 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHV, 6MSHV) | 6 | 2-Stroke | 1997 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHW, 6MSHW) | 6 | 2-Stroke | 1998 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHX, 6MSHX) | 6 | 2-Stroke | 1999 | 6G1-44352-00 |
| Yamaha | 6HP (6MLHY, 6MSHY) | 6 | 2-Stroke | 2000 | 6G1-44352-00 |
| Yamaha | 8HP (8LN, 8SN) | 8 | 2-Stroke | 1984 | 6G1-44352-00 |
| Yamaha | 8HP (8LK, 8SK) | 8 | 2-Stroke | 1985 | 6G1-44352-00 |
| Yamaha | 8HP (8LJ, 8SJ) | 8 | 2-Stroke | 1986 | 6G1-44352-00 |
| Yamaha | 8HP (8LH, 8SH) | 8 | 2-Stroke | 1987 | 6G1-44352-00 |
| Yamaha | 8HP (8LG, 8SG) | 8 | 2-Stroke | 1988 | 6G1-44352-00 |
| Yamaha | 8HP (8LF, 8SF) | 8 | 2-Stroke | 1898 | 6G1-44352-00 |
| Yamaha | 8HP (8LD, 8SD) | 8 | 2-Stroke | 1990 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHP, 8MSHP) | 8 | 2-Stroke | 1991 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHQ, 8MSHQ) | 8 | 2-Stroke | 1992 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHR, 8MSHR) | 8 | 2-Stroke | 1993 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHS, 8MSHS) | 8 | 2-Stroke | 1994 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHT, 8MSHT) | 8 | 2-Stroke | 1995 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHU, 8MSHU) | 8 | 2-Stroke | 1996 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHV, 8MSHV) | 8 | 2-Stroke | 1997 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHW, 8MSHW) | 8 | 2-Stroke | 1998 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHX, 8MSHX) | 8 | 2-Stroke | 1999 | 6G1-44352-00 |
| Yamaha | 8HP (8MLHY, 8MSHY) | 8 | 2-Stroke | 2000 | 6G1-44352-00 |
| Yamaha | 8HP (8MSHZ) | 8 | 2-Stroke | 2001 | 6G1-44352-00 |
| Yamaha | 8HP (8MSHA) | 8 | 2-Stroke | 2002 | 6G1-44352-00 |
| Yamaha | 8HP (8MSHB) | 8 | 2-Stroke | 2003 | 6G1-44352-00 |
| Yamaha | 8HP (8MSHC) | 8 | 2-Stroke | 2004 | 6G1-44352-00 |
| Yamaha | 8HP (8MSH, 8MSHD) | 8 | 2-Stroke | 2005 | 6G1-44352-00 |
| Yamaha | 8HP (8MSH) | 8 | 2-Stroke | 2006 | 6G1-44352-00 |
| Yamaha | 8HP (8MSH) | 8 | 2-Stroke | 2007 | 6G1-44352-00 |
| Yamaha | 8HP (8MSH) | 8 | 2-Stroke | 2008 | 6G1-44352-00 |
| Yamaha | 8HP (8MSH) | 8 | 2-Stroke | 2009 | 6G1-44352-00 |
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Mercury | 6C | 6 | 2-Stroke | 47-11590M |
| Mercury | 6D | 6 | 2-Stroke | 47-11590M |
| Mercury | 8C | 8 | 2-Stroke | 47-11590M |
Technical Specs
- Product Type
- Water Pump Impeller
- Material
- Neoprene Rubber
- Number of Blades
- 6
- Outer Diameter
- 39.56 mm (1.886 in)
- Impeller Height
- 14.00 mm (0.551 in)
- Shaft/Hub Diameter
- 10.90 mm (0.429 in)
- Weight
- 10g (0.35 oz)
- Color
- Black
What’s in the Box
- 1 x Water Pump Impeller (6G1-44352-00-00)
Installation Notes
- Ensure the engine is off and the battery is disconnected.
- Place a suitable container under the lower unit to catch any residual fluids.
- Remove the lower unit by loosening and removing the mounting bolts.
- Locate and unbolt the water pump housing.
- Remove the old impeller, noting the direction of the blades.
- Clean the interior of the pump housing and inspect it for wear or damage.
- Install the new impeller, using a twisting motion to bend the blades in the correct rotational direction. Ensure the drive key is aligned.
- Reassemble the water pump housing, ensuring a proper seal.
- Reinstall the lower unit, tighten all bolts to the manufacturer’s specified torque.
- Once assembled, test the engine using a water supply (flusher) to confirm proper water flow.
Troubleshooting & FAQ
How do I know if my impeller needs replacing?
Common signs of a failing impeller include a weak or non-existent water stream from the tell-tale outlet, engine overheating alarms, and visible cracks or stiffness in the impeller blades during inspection.
How often should I replace my impeller?
For preventative maintenance, it is recommended to replace your impeller every 1-2 years or every 100-200 hours of operation, depending on usage and water conditions (saltwater and sandy/silty water may require more frequent changes).
What is the difference between this impeller and the OEM part?
This is a high-quality aftermarket part designed to meet or exceed OEM specifications. It is made from comparable neoprene materials and manufactured to the same dimensional tolerances for a direct fit and reliable performance, but at a more accessible price point.
Can I install this impeller myself?
Yes, many boat owners with basic mechanical skills can perform the replacement. However, if you are unfamiliar with the process, we recommend consulting a service manual for your specific engine or hiring a professional marine mechanic to ensure it is done correctly.
What happens if an impeller fails?
Impeller failure will stop the flow of cooling water to your engine, leading to rapid overheating. This can cause severe and permanent damage, including a seized engine. Regular inspection and replacement are critical to prevent this.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
