Water Pump Repair Kit – Fits Yamaha 40-60HP Outboards (Replaces 63D-W0078-01-00)
Water Pump Repair Kit – Fits Yamaha 40-60HP Outboards (Replaces 63D-W0078-01-00) is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit – Fits Yamaha 40-60HP Outboards (Replaces 63D...
Water Pump Repair Kit – Fits Yamaha 40-60HP Outboards (Replaces 63D-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Repair Kit – Fits Yamaha 40-60HP Outboards (Replaces 63D-W0078-01-00) provides everything needed to restore your cooling system. It is designed for a precise fit on Yamaha 2-Stroke 40-50HP models (1997–2005) and 4-Stroke F40 (1999), F50 (1997 and newer), and F60 (2002 and newer) outboards, ensuring reliable performance and engine protection.
This kit serves as a direct interchange for Yamaha OEM part numbers 63D-W0078-01-00, 63D-W0078-03-00, and 63D-W0078-00-00.
- Engineered for direct replacement of the lower unit water pump assembly.
- Includes all necessary components for a full rebuild: housing, impeller, gaskets, and hardware.
- Restores proper engine cooling to prevent overheating and maintain performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 63D-W0078-01-00 |
| Yamaha | 63D-W0078-03-00 |
| Yamaha | 63D-W0078-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Yamaha Outboards (2-Stroke)
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40EJRV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | 40EJRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| Yamaha | 40EJRX | 40 | 2-Stroke | 1999 | 63D-W0078-01-00 | |
| Yamaha | 40ELRV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | 40ELRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| Yamaha | 40ESRV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | 40ESRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| Yamaha | 40ESRX | 40 | 2-Stroke | 1999 | 63D-W0078-01-00 | |
| Yamaha | 40MJHV/W/X/Y/Z | 40 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| Yamaha | 40MLHV/W/X/Y/Z | 40 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| Yamaha | 40MSHV/W/X | 40 | 2-Stroke | 1997–1999 | 63D-W0078-01-00 | |
| Yamaha | 40TLHV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | 40TLR | 40 | 2-Stroke | 2004–2005 | 63D-W0078-01-00 | |
| Yamaha | 40TLRA/B/C/D | 40 | 2-Stroke | 2002–2005 | 63D-W0078-01-00 | |
| Yamaha | 40TLRNC | 40 | 2-Stroke | 2004 | 63D-W0078-01-00 | |
| Yamaha | 40TLRV/W/X/Y/Z | 40 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| Yamaha | 50EJRV/W/X/Y/Z | 50 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| Yamaha | 50ELRV/W | 50 | 2-Stroke | 1997–1998 | 63D-W0078-01-00 | |
| Yamaha | 50TLHV | 50 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | 50TLR | 50 | 2-Stroke | 2004–2009 | 63D-W0078-01-00 | |
| Yamaha | 50TLRA/B/C/D | 50 | 2-Stroke | 2002–2005 | 63D-W0078-01-00 | |
| Yamaha | 50TLRNC | 50 | 2-Stroke | 2004 | 63D-W0078-01-00 | |
| Yamaha | 50TLRV/Z | 50 | 2-Stroke | 1997, 2001 | 63D-W0078-01-00 | |
| Yamaha | C40TLRA/B/V/W/X/Y/Z | 40 | 2-Stroke | 1997–2003 | 63D-W0078-01-00 | Commercial variant |
| Yamaha | C50TLRW/X/Y/Z | 50 | 2-Stroke | 1998–2001 | 63D-W0078-01-00 | Commercial variant |
| Yamaha | P40TLHW, P40TLRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| Yamaha | T50TLRC, T50TLRV | 50 | 2-Stroke | 1997, 2004 | 63D-W0078-01-00 | High thrust variant |
Yamaha Outboards (4-Stroke)
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F40TLRX | 40 | 4-Stroke | 1999 | 63D-W0078-01-00 | |
| Yamaha | F50LA | 50 | 4-Stroke | 2011–2012 | 63D-W0078-01-00 | |
| Yamaha | F50LB | 50 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 | |
| Yamaha | F50TLHV | 50 | 4-Stroke | 1997 | 63D-W0078-01-00 | |
| Yamaha | F50TLR | 50 | 4-Stroke | 2004–2011 | 63D-W0078-01-00 | |
| Yamaha | F50TLRA/B/C/D | 50 | 4-Stroke | 2002–2005 | 63D-W0078-01-00 | |
| Yamaha | F50TLRV/W/X/Y/Z | 50 | 4-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| Yamaha | F60JB | 60 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 | |
| Yamaha | F60LA | 60 | 4-Stroke | 2011–2012 | 63D-W0078-01-00 | |
| Yamaha | F60LB | 60 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 | |
| Yamaha | F60TJR | 60 | 4-Stroke | 2004–2007 | 63D-W0078-01-00 | |
| Yamaha | F60TJRB/C/D | 60 | 4-Stroke | 2003–2005 | 63D-W0078-01-00 | |
| Yamaha | F60TLR | 60 | 4-Stroke | 2004–2011 | 63D-W0078-01-00 | |
| Yamaha | F60TLRA/B/C/D | 60 | 4-Stroke | 2002–2005 | 63D-W0078-01-00 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct replacement for lower unit water pump assembly
- Other Technical Attributes
- Includes complete pump housing, impeller, gaskets, o-rings, and mounting hardware
What’s in the Box
- 1 x Cartridge Insert (63D-44322-00-00)
- 1 x Impeller (6H3-44352-00-00)
- 1 x Water Pump Housing Cover (63D-44312-00-00)
- 1 x Cartridge Outer Plate (63D-44323-00-00)
- 1 x O-Ring (93210-59MG7-00)
- 1 x Water Pump Gasket (63D-44316-00-00)
- 4 x Bolts With Washers (90119-08M15-00)
- 1 x Water Seal Damper (663-44366-00-00)
- 1 x Woodruff Key (90280-03024-00)
Installation Notes
Installation should be performed by a qualified marine mechanic. Always refer to your engine's service manual for detailed procedures. After disconnecting the battery and removing the lower unit, unbolt the old water pump housing. Clean all mating surfaces thoroughly. Lightly apply marine grease to the new impeller and internal housing surfaces before assembling the new kit. Install the components in the reverse order of removal, ensuring all gaskets and seals are seated correctly and bolts are torqued to manufacturer specifications. Note: Marine grease is recommended for installation but not included in this kit.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine?
The best way is to match your engine's model and year to our compatibility tables. You can also verify by cross-referencing your existing water pump's part number with the numbers listed in our Part Number Matrix (63D-W0078-01-00, 63D-W0078-03-00, 63D-W0078-00-00).
What are the signs of a failing water pump?
Common signs include the engine overheating at idle or low speeds, a weak or non-existent "telltale" water stream, and an audible alarm from your engine's warning system. A damaged impeller is the most frequent cause of failure.
How often should a water pump impeller be replaced?
As a preventative maintenance item, most manufacturers recommend replacing the water pump impeller every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you operate in sandy or debris-heavy water.
Does this kit include the pump housing?
Yes, this is a complete kit that includes the water pump housing cover (63D-44312-00-00) and all essential internal components for a full replacement.
Is marine grease required for installation?
Yes, applying a light coat of marine-grade grease to the impeller and inside the housing cup is highly recommended to ensure a good seal and provide lubrication during the initial startup. Please note that grease is not included in this kit.
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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