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Description
Water Pump Impeller Kit – Fits Yamaha 40/50/60HP 2-Stroke & 4-Stroke (Replaces 63D-W0078-01)Water Pump Impeller Kit Fits Yamaha 40 50 60HP 2 Stroke & 4 Stroke (Replaces 63D W0078 01) This complete water pump impeller repair kit provides everything needed for a full service of the lower unit water pump. It is designed for a wide range of Yamaha 2 stroke and 4 stroke outboard engines, ensuring reliable performance and cooling. This kit is a direct aftermarket replacement for Yamaha OEM part numbers 63D W0078 01 00, 63D W0078 03 00, 63D W0078
Water Pump Impeller Kit – Fits Yamaha 40/50/60HP 2-Stroke & 4-Stroke (Replaces 63D-W0078-01)
This complete water pump impeller repair kit provides everything needed for a full service of the lower unit water pump. It is designed for a wide range of Yamaha 2-stroke and 4-stroke outboard engines, ensuring reliable performance and cooling.
This kit is a direct aftermarket replacement for Yamaha OEM part numbers 63D-W0078-01-00, 63D-W0078-03-00, 63D-W0078-02-00, and others, offering a high-quality alternative for routine maintenance or repair.
- Engine Compatibility: Fits select Yamaha 40, 50, and 60 HP models (2-Stroke and 4-Stroke).
- Installation Location: Mounts in the lower unit/gearcase assembly.
- Quality Standard: Manufactured in an ISO9002 certified facility to meet or exceed OEM specifications.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 63D-W0078-01-00 |
| Yamaha | 63D-W0078-03-00 |
| Yamaha | 63D-W0078-02-00 |
| Yamaha | 63D-W0078-00-00 |
| Yamaha | 6H4-W0078-00 |
| Yamaha | 6H4-W0078-01-00 |
| Yamaha | 6H4-W0078-A0-00 |
| Sierra | 18-3415 |
| Sierra | 18-3434 |
| GLM | 12276 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
Yamaha 2-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 40EJRV/40EJRW/40EJRX | 40 | 2-Stroke | 1997-1999 | 63D-W0078-01 |
| Yamaha | 40ELRV/40ELRW | 40 | 2-Stroke | 1997-1998 | 63D-W0078-01 |
| Yamaha | 40ESRV/40ESRW/40ESRX | 40 | 2-Stroke | 1997-1999 | 63D-W0078-01 |
| Yamaha | 40MJHV/40MJHW/40MJHX/40MJHY/40MJHZ | 40 | 2-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | 40MLHV/40MLHW/40MLHX/40MLHY/40MLHZ | 40 | 2-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | 40MSHV/40MSHW/40MSHX | 40 | 2-Stroke | 1997-1999 | 63D-W0078-01 |
| Yamaha | 40TLHV | 40 | 2-Stroke | 1997 | 63D-W0078-01 |
| Yamaha | 40TLR | 40 | 2-Stroke | 2004-2005 | 63D-W0078-01 |
| Yamaha | 40TLRA/40TLRB/40TLRC/40TLRD | 40 | 2-Stroke | 2002-2005 | 63D-W0078-01 |
| Yamaha | 40TLRNC | 40 | 2-Stroke | 2004 | 63D-W0078-01 |
| Yamaha | 40TLRV/40TLRW/40TLRX/40TLRY/40TLRZ | 40 | 2-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | 50EJRV/50EJRW/50EJRX/50EJRY/50EJRZ | 50 | 2-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | 50ELRV/50ELRW | 50 | 2-Stroke | 1997-1998 | 63D-W0078-01 |
| Yamaha | 50TLHV | 50 | 2-Stroke | 1997 | 63D-W0078-01 |
| Yamaha | 50TLR | 50 | 2-Stroke | 2004-2009 | 63D-W0078-01 |
| Yamaha | 50TLRA/50TLRB/50TLRC/50TLRD | 50 | 2-Stroke | 2002-2005 | 63D-W0078-01 |
| Yamaha | 50TLRNC | 50 | 2-Stroke | 2004 | 63D-W0078-01 |
| Yamaha | 50TLRV/50TLRZ | 50 | 2-Stroke | 1997, 2001 | 63D-W0078-01 |
| Yamaha | C40TLRA/C40TLRB | 40 | 2-Stroke | 2002-2003 | 63D-W0078-01 |
| Yamaha | C40TLRV/C40TLRW/C40TLRX/C40TLRY/C40TLRZ | 40 | 2-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | C50TLRW/C50TLRX/C50TLRY/C50TLRZ | 50 | 2-Stroke | 1998-2001 | 63D-W0078-01 |
| Yamaha | P40TLHW/P40TLRW | 40 | 2-Stroke | 1998 | 63D-W0078-01 |
| Yamaha | T50TLRC | 50 | 2-Stroke | 2004 | 63D-W0078-01 |
| Yamaha | T50TLRV | 50 | 2-Stroke | 1997 | 63D-W0078-01 |
Yamaha 4-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F40TLRX | 40 | 4-Stroke | 1999 | 63D-W0078-01 |
| Yamaha | F50LA | 50 | 4-Stroke | 2012-present | 63D-W0078-01 |
| Yamaha | F50LB | 50 | 4-Stroke | 2013-2016 | 63D-W0078-01 |
| Yamaha | F50TLHV | 50 | 4-Stroke | 1997 | 63D-W0078-01 |
| Yamaha | F50TLR | 50 | 4-Stroke | 2004-2011 | 63D-W0078-01 |
| Yamaha | F50TLRA/F50TLRB/F50TLRC/F50TLRD | 50 | 4-Stroke | 2002-2005 | 63D-W0078-01 |
| Yamaha | F50TLRV/F50TLRW/F50TLRX/F50TLRY/F50TLRZ | 50 | 4-Stroke | 1997-2001 | 63D-W0078-01 |
| Yamaha | F60JB | 60 | 4-Stroke | 2013-2016 | 63D-W0078-01 |
| Yamaha | F60LA | 60 | 4-Stroke | 2012 | 63D-W0078-01 |
| Yamaha | F60LB | 60 | 4-Stroke | 2013-2016 | 63D-W0078-01 |
| Yamaha | F60TJR | 60 | 4-Stroke | 2004-2007 | 63D-W0078-01 |
| Yamaha | F60TJRB/F60TJRC/F60TJRD | 60 | 4-Stroke | 2003-2005 | 63D-W0078-01 |
| Yamaha | F60TLR | 60 | 4-Stroke | 2004-2011 | 63D-W0078-01 |
| Yamaha | F60TLRA/F60TLRB/F60TLRC/F60TLRD | 60 | 4-Stroke | 2002-2005 | 63D-W0078-01 |
Technical Specifications
| Product Type | Water Pump Impeller Kit |
| Installation | Lower Unit/Gearcase |
| Other Technical Attributes | Manufactured to OEM specifications in ISO9002 certified factory |
Package Contents
- 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 Bolt with Washer (90119-08M15-00)
- 1 x Water Seal Damper (663-44366-00-00)
- 1 x Woodruff Key (90280-03024-00)
Installation Guide
- Disconnect the battery and shift the outboard motor into the neutral position.
- Locate and remove the mounting bolts that secure the lower unit (gearcase) to the engine's midsection.
- Carefully lower and separate the gearcase from the rest of the outboard.
- Unbolt and remove the old water pump housing to access the impeller.
- Remove the old impeller, wear plate, and gaskets, taking note of their correct orientation.
- Thoroughly clean all mating surfaces on the gearcase and housing.
- Install the new gasket, wear plate, and Woodruff key onto the driveshaft.
- Slide the new impeller onto the driveshaft, turning clockwise to seat the vanes correctly inside the housing cup.
- Install the new housing, cartridge, and seals, ensuring everything is properly aligned.
- Secure the new housing with the provided bolts, tightening them to the manufacturer's recommended torque specifications.
- Carefully re-install the lower unit onto the engine and tighten the mounting bolts.
- Reconnect the battery and test the engine using a reliable water source (flushing muffs or in the water) to verify proper water flow from the tell-tale port.
Troubleshooting & FAQ
Question: How do I confirm this kit fits my engine?
Answer: This kit is designed for a specific range of Yamaha 40, 50, and 60 HP 2-stroke and 4-stroke outboards. Please review the detailed "Compatible Engine Models" tables on this page and compare your engine's model and year. Verifying the OEM part number (63D-W0078-01) against your service manual is the most reliable method of confirming fitment.
Question: What are the signs of a failing water pump impeller?
Answer: Common signs of a worn or failing impeller include a weak or inconsistent stream of water from the tell-tale outlet, frequent engine overheating alarms, or discovering a brittle, cracked, or deformed impeller during a visual inspection.
Question: How often should I replace my water pump kit?
Answer: For preventative maintenance, it is recommended to inspect and/or replace your water pump impeller and components every one to two years, or every 100-200 hours of operation. This interval can vary based on usage conditions, particularly in saltwater or silty environments.
Question: OEM vs. Aftermarket?
Answer: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Question: How fast do you ship and how much does it cost?
Answer: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Question: What is your warranty and return policy?
Answer: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy