Water Pump Impeller – Fits Yamaha 40-70 HP (Replaces 6H3-44352-00-00, 697-44352-00-00)
Water Pump Impeller – Fits Yamaha 40-70 HP (Replaces 6H3-44352-00-00, 697-44352-00-00) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Yamaha 40-70 HP (Replaces 6H3-44352-00-0...
Product Details
This aftermarket Water Pump Impeller – Fits Yamaha 40-70 HP (Replaces 6H3-44352-00-00, 697-44352-00-00) is designed for a broad range of Yamaha outboards, including 40-70 HP 2-Stroke (1984–2005) and F40-F70 4-Stroke models (1995–2016). It also fits select Mercury/Mariner 48-60 HP engines.
It serves as a direct replacement for Yamaha parts 6H3-44352-00-00 and 697-44352-00-00, as well as Sierra 18-3069, CEF 500316, Mallory 9-45602, and several Mercury/Mariner equivalents.
- Engineered as a direct OEM-equivalent replacement for straightforward installation.
- Constructed from durable neoprene and a hardened nylon hub for longevity.
- Features a 6-blade design to ensure optimal water flow and cooling performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6H3-44352-00-00 |
| Yamaha | 697-44352-00-00 |
| Sierra | 18-3069 |
| CEF | 500316 |
| Mallory | 9-45602 |
| Mercury/Mariner | 47-97108M |
| Mercury/Mariner | 47-81423M |
| Mercury/Mariner | 81423M |
| Mercury/Mariner | 879124 |
| Mercury/Mariner | 82824M |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this impeller fits a wide variety of 2-stroke and 4-stroke models from 40 to 70 HP. Please verify your specific model and year range.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40EJRT, 40EJRU, 40EJRV, 40EJRW, 40EJRX | 40 | 2-Stroke | 1995–1999 | 6H3-44352-00-00 | |
| Yamaha | 40ELRT, 40ELRU, 40ELRV, 40ELRW | 40 | 2-Stroke | 1995–1998 | 6H3-44352-00-00 | |
| Yamaha | 40ESRT, 40ESRU, 40ESRV, 40ESRW, 40ESRX | 40 | 2-Stroke | 1995–1999 | 6H3-44352-00-00 | |
| Yamaha | 40MJHT through 40MJHZ | 40 | 2-Stroke | 1995–2001 | 6H3-44352-00-00 | |
| Yamaha | 40MLHT through 40MLHZ | 40 | 2-Stroke | 1995–2001 | 6H3-44352-00-00 | |
| Yamaha | 40MSHT through 40MSHX | 40 | 2-Stroke | 1995–1999 | 6H3-44352-00-00 | |
| Yamaha | 40TLHU, 40TLHV | 40 | 2-Stroke | 1996–1997 | 6H3-44352-00-00 | |
| Yamaha | 40TLR | 40 | 2-Stroke | 2004–2005 | 6H3-44352-00-00 | |
| Yamaha | 40TLRA through 40TLRD | 40 | 2-Stroke | 2002–2005 | 6H3-44352-00-00 | |
| Yamaha | 40TLRNC | 40 | 2-Stroke | 2004 | 6H3-44352-00-00 | |
| Yamaha | 40TLRT through 40TLRZ | 40 | 2-Stroke | 1995–2001 | 6H3-44352-00-00 | |
| Yamaha | C40TLRA through C40TLRZ | 40 | 2-Stroke | 1997–2003 | 6H3-44352-00-00 | Commercial model |
| Yamaha | P40TLHW, P40TLRW | 40 | 2-Stroke | 1998 | 6H3-44352-00-00 | |
| Yamaha | F40TLRX | 40 | 4-Stroke | 1999 | 6H3-44352-00-00 | |
| Yamaha | F40MJHA through F40MJHD | 40 | 4-Stroke | 2002–2005 | 6H3-44352-00-00 | PUMP models |
| Yamaha | F40EJRB through F40EJRD | 40 | 4-Stroke | 2003–2005 | 6H3-44352-00-00 | PUMP models |
| Yamaha | 50EJRT through 50EJRZ | 50 | 2-Stroke | 1995–2001 | 6H3-44352-00-00 | |
| Yamaha | 50ELRT, 50ELRV, 50ELRW | 50 | 2-Stroke | 1995–1998 | 6H3-44352-00-00 | |
| Yamaha | 50TLHT, 50TLHU, 50TLHV | 50 | 2-Stroke | 1995–1997 | 6H3-44352-00-00 | |
| Yamaha | 50TLR | 50 | 2-Stroke | 2004–2009 | 6H3-44352-00-00 | |
| Yamaha | 50TLRA through 50TLRD | 50 | 2-Stroke | 2002–2005 | 6H3-44352-00-00 | |
| Yamaha | 50TLRNC | 50 | 2-Stroke | 2004 | 6H3-44352-00-00 | |
| Yamaha | 50TLRU, 50TLRV, 50TLRZ | 50 | 2-Stroke | 1996–2001 | 6H3-44352-00-00 | |
| Yamaha | C50TLRW through C50TLRZ | 50 | 2-Stroke | 1998–2001 | 6H3-44352-00-00 | Commercial model |
| Yamaha | P50TLRT, P50TLRU | 50 | 2-Stroke | 1995–1996 | 6H3-44352-00-00 | |
| Yamaha | F50LA | 50 | 4-Stroke | 2012 | 6H3-44352-00-00 | Multiple model years |
| Yamaha | F50LB | 50 | 4-Stroke | 2013–2016 | 6H3-44352-00-00 | |
| Yamaha | F50TJRA | 50 | 4-Stroke | 2002 | 6H3-44352-00-00 | PUMP model |
| Yamaha | F50TLHT through F50TLHW | 50 | 4-Stroke | 1995–1998 | 6H3-44352-00-00 | |
| Yamaha | F50TLR | 50 | 4-Stroke | 2004–2011 | 6H3-44352-00-00 | Multiple model variants |
| Yamaha | F50TLRA through F50TLRD | 50 | 4-Stroke | 2002–2005 | 6H3-44352-00-00 | |
| Yamaha | F50TLRT through F50TLRZ | 50 | 4-Stroke | 1995–2001 | 6H3-44352-00-00 | |
| Yamaha | T50TLRU through T50TLRZ | 50 | 4-Stroke | 1996–2001 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T50TLRA through T50TLRD | 50 | 4-Stroke | 2002–2005 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T50TLR | 50 | 4-Stroke | 2004–2011 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T50LA | 50 | 4-Stroke | 2012 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T50LB | 50 | 4-Stroke | 2013–2016 | 6H3-44352-00-00 | High thrust model |
| Yamaha | 55B | 55 | 2-Stroke | 1990–2003 | 6H3-44352-00-00 | Multiple variants and years |
| Yamaha | CV55E | 55 | 2-Stroke | 1989–1990 | 6H3-44352-00-00 | |
| Yamaha | C55E | 55 | 2-Stroke | 1990–1991 | 6H3-44352-00-00 | |
| Yamaha | 60TLRA, 60TLRB, 60TLRZ | 60 | 2-Stroke | 2001–2003 | 6H3-44352-00-00 | |
| Yamaha | C60ELRU | 60 | 2-Stroke | 1996 | 6H3-44352-00-00 | Commercial model |
| Yamaha | C60TLRU through C60TLRZ | 60 | 2-Stroke | 1996–2001 | 6H3-44352-00-00 | Commercial model |
| Yamaha | E60MLHT through E60MLHY | 60 | 2-Stroke | 1995–2000 | 6H3-44352-00-00 | Enduro model |
| Yamaha | F60LA | 60 | 4-Stroke | 2012 | 6H3-44352-00-00 | |
| Yamaha | F60LB | 60 | 4-Stroke | 2013–2016 | 6H3-44352-00-00 | |
| Yamaha | F60TJR | 60 | 4-Stroke | 2004–2007 | 6H3-44352-00-00 | Multiple variants |
| Yamaha | F60TJRB through F60TJRD | 60 | 4-Stroke | 2003–2005 | 6H3-44352-00-00 | PUMP models available |
| Yamaha | F60TLR | 60 | 4-Stroke | 2004–2011 | 6H3-44352-00-00 | Multiple variants |
| Yamaha | F60TLRA through F60TLRD | 60 | 4-Stroke | 2002–2005 | 6H3-44352-00-00 | |
| Yamaha | T60TLRB through T60TLRD | 60 | 4-Stroke | 2003–2005 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T60TLR | 60 | 4-Stroke | 2004–2011 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T60LA | 60 | 4-Stroke | 2012 | 6H3-44352-00-00 | High thrust model |
| Yamaha | T60LB | 60 | 4-Stroke | 2013–2016 | 6H3-44352-00-00 | High thrust model |
| Yamaha | P60TLHP through P60TLHX | 60 | 2-Stroke | 1991–1999 | 6H3-44352-00-00 | |
| Yamaha | 70ETLN through 70ETLDA | 70 | 2-Stroke | 1984–1990 | 6H3-44352-00-00 | |
| Yamaha | 70TLRP through 70TLRZ | 70 | 2-Stroke | 1991–2001 | 6H3-44352-00-00 | |
| Yamaha | 70TLRA, 70TLRB | 70 | 2-Stroke | 2002–2003 | 6H3-44352-00-00 | |
| Yamaha | C70TLRY, C70TLRZ | 70 | 2-Stroke | 2000–2001 | 6H3-44352-00-00 | Commercial model |
| Yamaha | F70LA | 70 | 4-Stroke | 2010–2016 | 6H3-44352-00-00 | Multiple model variants |
For Mercury/Mariner engines, fitment is determined by serial number. Ensure your engine's model and serial number range aligns with the information below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury/Mariner | 48, 48W | 48 | 2-Stroke | 47-97108M | Serial No. 670-ALL |
| Mercury/Mariner | 55, W55 | 55 | 2-Stroke | 47-97108M | Serial No. 63-ALL |
| Mercury/Mariner | 60 | 60 | 2-Stroke | 47-97108M | Serial No. 675, 6F0-ALL |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- OEM Direct Replacement
- Material
- Neoprene and Hardened Nylon
- Number of Blades
- 6
- Impeller Height
- 19.1 mm (0.752 inch)
- Overall Diameter
- 51.8 mm (2.039 inch)
- Shaft Diameter
- 18.0 mm (0.709 inch)
- Weight
- 20 g (0.71 oz)
- OEM Warranty
- 1 Year (aftermarket varies by manufacturer)
What’s in the Box
- 1 x Water Pump Impeller
Installation Notes
- Disconnect the battery and shift the outboard into neutral.
- Drain the gearcase oil from the lower unit.
- Remove the bolts securing the lower unit (gearcase) to the upper casing.
- Carefully lower and separate the gearcase to access the water pump assembly.
- Unbolt and remove the water pump housing cover.
- Slide the old impeller off the driveshaft, noting the direction of the blades. Clean any debris.
- Lightly lubricate the new impeller and housing interior with marine grease.
- Install the new impeller onto the driveshaft, rotating it in the direction of engine operation to seat the blades correctly.
- Reinstall the water pump housing and torque bolts to manufacturer specifications.
- Raise the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure the bolts.
- Refill the gearcase with the specified oil.
- Reconnect the battery and test the engine using a water supply (flusher or in water) to confirm cooling system operation.
Troubleshooting & FAQ
How can I confirm this impeller fits my engine?
The best way is to cross-reference your existing part number with those listed in the "Part Number Matrix." If you cannot find it, check the "Engine & Model Compatibility" tables. Always verify your engine's model, HP, and year (or serial number) against the chart.
What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent "telltale" water stream, or a high engine temperature alarm. Visually, a worn impeller will have cracked, brittle, or permanently curved blades.
How often should I replace the water pump impeller?
As a general maintenance rule, it is recommended to inspect and/or replace the impeller every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., more frequently in saltwater or sandy/silty water).
Is a gasket or water pump repair kit included?
This listing is for the impeller only. Gaskets, housing, wear plates, and other components of a full water pump repair kit are sold separately. It is highly recommended to replace gaskets when servicing the impeller.
Why did my new impeller fail shortly after installation?
Premature failure is often caused by running the engine dry (even for a few seconds), which burns the neoprene blades. Other causes include debris in the cooling system, a scored or warped pump housing, or incorrect installation (e.g., blades folded in the wrong direction).
Is this an OEM or aftermarket part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for unused parts in their original condition. See our full 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.
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