Yamaha Water Pump Repair Kit for 40–60 HP Outboards – Replaces 63D-W0078-01-00
Yamaha Water Pump Repair Kit for 40–60 HP Outboards – Replaces 63D-W0078-01-00 is backordered and will ship as soon as it is back in stock.
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Yamaha Water Pump Repair Kit for 40–60 HP Outboards – Replaces 63D-...
Yamaha Water Pump Repair Kit for 40–60 HP Outboards – Replaces 63D-W0078-01-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump repair kit is designed to restore the lower-unit cooling-water pump on selected Yamaha 40–60 HP outboards. It replaces Yamaha water pump repair kit part number 63D-W0078-01-00 and includes the pump components needed for a complete water-pump service.
The repair kit is listed for selected Yamaha 2-Stroke and 4-Stroke models from the late 1990s through the 2010s. Always match the exact model designation and year of your outboard before ordering; horsepower alone is not sufficient to confirm fitment.
- Replacement water pump repair kit for the lower unit.
- Includes the pump housing cover, cartridge components, impeller, gaskets, seals, fasteners, and key listed below.
- Helps restore water circulation and proper engine cooling after water-pump wear or impeller damage.
- Aftermarket replacement; not manufactured by Yamaha.
Part Number
| Brand | Reference | Type |
|---|---|---|
| Yamaha | 63D-W0078-01-00 | Water pump repair kit reference |
Engine & Model Compatibility
The following model and year combinations are associated with this water pump repair kit reference in the available engine catalog data. Model suffixes, shaft configurations, and production years must remain matched when checking fitment.
Yamaha 2-Stroke Outboards
| Model | Rated HP | Stroke | Year or years | Reference | Notes |
|---|---|---|---|---|---|
| 40EJRV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| 40EJRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| 40EJRX | 40 | 2-Stroke | 1999 | 63D-W0078-01-00 | |
| 40ELRV, 40ELRW | 40 | 2-Stroke | 1997–1998 | 63D-W0078-01-00 | |
| 40ESRV, 40ESRW, 40ESRX | 40 | 2-Stroke | 1997–1999 | 63D-W0078-01-00 | |
| 40MJHV/W/X/Y/Z; 40MLHV/W/X/Y/Z | 40 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| 40MSHV/W/X | 40 | 2-Stroke | 1997–1999 | 63D-W0078-01-00 | |
| 40TLHV | 40 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| 40TLR; 40TLRA/B/C/D; 40TLRNC | 40 | 2-Stroke | 2002–2005 | 63D-W0078-01-00 | Includes listed 2004–2005 variants |
| 40TLRV/W/X/Y/Z | 40 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| 50EJRV/W/X/Y/Z | 50 | 2-Stroke | 1997–2001 | 63D-W0078-01-00 | |
| 50ELRV/W | 50 | 2-Stroke | 1997–1998 | 63D-W0078-01-00 | |
| 50TLHV | 50 | 2-Stroke | 1997 | 63D-W0078-01-00 | |
| 50TLR; 50TLRA/B/C/D; 50TLRNC | 50 | 2-Stroke | 2002–2009 | 63D-W0078-01-00 | Includes listed 2004–2009 and commercial variants |
| 50TLRV/Z | 50 | 2-Stroke | 1997 and 2001 | 63D-W0078-01-00 | |
| C40TLRA/B/V/W/X/Y/Z | 40 | 2-Stroke | 1997–2003 | 63D-W0078-01-00 | Commercial variant |
| C50TLRW/X/Y/Z | 50 | 2-Stroke | 1998–2001 | 63D-W0078-01-00 | Commercial variant |
| P40TLHW, P40TLRW | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 | |
| T50TLRC, T50TLRV | 50 | 2-Stroke | 1997 and 2004 | 63D-W0078-01-00 | High-thrust variants |
Yamaha 4-Stroke Outboards
| Model | Rated HP | Stroke | Year or years | Reference |
|---|---|---|---|---|
| F40TLRX | 40 | 4-Stroke | 1999 | 63D-W0078-01-00 |
| F50LA | 50 | 4-Stroke | 2011–2012 | 63D-W0078-01-00 |
| F50LB | 50 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 |
| F50TLHV | 50 | 4-Stroke | 1997 | 63D-W0078-01-00 |
| F50TLR; F50TLRA/B/C/D; F50TLRV/W/X/Y/Z | 50 | 4-Stroke | 1997–2011 | 63D-W0078-01-00 |
| F60JB | 60 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 |
| F60LA | 60 | 4-Stroke | 2011–2012 | 63D-W0078-01-00 |
| F60LB | 60 | 4-Stroke | 2013–2016 | 63D-W0078-01-00 |
| F60TJR; F60TJRB/C/D | 60 | 4-Stroke | 2003–2007 | 63D-W0078-01-00 |
| F60TLR; F60TLRA/B/C/D | 60 | 4-Stroke | 2002–2011 | 63D-W0078-01-00 |
Technical Specifications
- Product type
- Water pump repair kit
- Application
- Lower-unit water pump service
- Stroke coverage
- Selected Yamaha 2-Stroke and 4-Stroke outboards
- Rated horsepower coverage
- Selected 40 HP, 50 HP, and 60 HP models
- Installation
- Direct replacement-style repair kit; installation requires removal of the lower unit
What's in the Box
- 1 × Cartridge Insert — 63D-44322-00-00
- 1 × Impeller — 6H3-44352-00-00
- 1 × Water Pump Housing Cover — 63D-44312-00-00
- 1 × Cartridge Outer Plate — 63D-44323-00-00
- 1 × O-Ring — 93210-59MG7-00
- 1 × Water Pump Gasket — 63D-44316-00-00
- 4 × Bolts with Washers — 90119-08M15-00
- 1 × Water Seal Damper — 663-44366-00-00
- 1 × Woodruff Key — 90280-03024-00
Installation Notes
Installation should be performed by a qualified marine mechanic. Refer to the service manual for your exact engine before beginning work. After removing the lower unit, remove the old water-pump components and clean all mating surfaces. Install the new gasket, cartridge components, housing cover, impeller, seal, key, and fasteners in the correct order. Ensure that all seals are seated correctly and tighten fasteners to the specifications for your engine. A light coat of suitable marine grease may be used during installation where specified by the service manual; grease is not included.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Match the complete engine model designation, year, stroke type, and applicable reference number. Do not rely on horsepower alone. If your original water-pump kit is marked 63D-W0078-01-00, compare the parts and configuration before ordering.
What are common signs of a failing water pump?
Symptoms may include overheating at idle or low speed, a weak or missing telltale stream, an overheating warning, or visible impeller damage. Shut down the engine if overheating occurs and diagnose the cooling system before further operation.
How often should the impeller be replaced?
Replacement intervals depend on the engine manufacturer's maintenance schedule and operating conditions. Inspect the impeller regularly and replace it sooner when operating in sandy, silty, or debris-heavy water.
Does the kit include the pump housing?
Yes. The package includes the water pump housing cover and the other components listed in the box contents. Verify the supplied parts against your original assembly before installation.
Is marine grease included?
No. Marine grease or other installation lubricant is not included. Use only products and procedures recommended for your specific engine.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement kit intended for the listed applications. Yamaha is referenced only to identify the compatible engine models and replacement part reference.
Safety & Important Information
- Verify the exact engine model, year, stroke type, and original pump configuration before purchase.
- Compare the supplied components with the original parts before installation.
- Disconnect the battery and follow the engine service manual before removing the lower unit.
- Professional installation is recommended, especially when lower-unit removal or gearcase service is required.
- Stop operation immediately if the engine overheats or the telltale stream is absent after installation.
About Sea Sierra
- Marine replacement parts — Practical aftermarket components for routine service and repair.
- Application-focused listings — Model, year, horsepower, and stroke information is provided to support fitment checks.
- Support for installation planning — Review the parts list and service requirements before beginning your repair.
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