Water Pump Repair Kit with Housing – Fits Yamaha 40-60 HP Outboards (Replaces 63D-W0078-01-00, Sierra 18-3415)
Water Pump Repair Kit with Housing – Fits Yamaha 40-60 HP Outboards (Replaces 63D-W0078-01-00, Sierra 18-3415) is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit with Housing – Fits Yamaha 40-60 HP Outboards...
Water Pump Repair Kit with Housing – Fits Yamaha 40-60 HP Outboards (Replaces 63D-W0078-01-00, Sierra 18-3415) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit with Housing is an aftermarket replacement kit for selected Yamaha 2-stroke and 4-stroke outboard engines. It is intended for servicing the water pump in the lower unit and includes the housing, impeller, wear plate, gaskets, seals, key, insert cup and installation hardware needed for the listed applications.
The kit replaces Yamaha OEM part number 63D-W0078-01-00 and corresponds to Sierra part number 18-3415. Confirm the exact engine model, horsepower, stroke, year and serial-number range before ordering.
- Complete water pump repair kit supplied with the water pump housing.
- Designed for installation in the outboard lower unit.
- Includes the principal pump-service components and hardware required for the listed applications.
Part Number Matrix
Use these verified reference numbers when comparing the kit with your existing water pump parts.
| Brand or Reference | Part Number | Application |
|---|---|---|
| Yamaha OEM | 63D-W0078-01-00 | Water pump repair kit |
| Sierra | 18-3415 | Water pump kit with housing |
Engine & Model Compatibility
The following applications are associated with this kit in the available catalog information. Model designations and year ranges must remain together; do not use horsepower alone to determine fitment.
| Brand | Model or Application | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 40/50 | 40-50 | 2-Stroke | 1995-2003 | 63D-W0078-01-00 |
| Yamaha | P40 | 40 | 2-Stroke | 1998 | 63D-W0078-01-00 |
| Yamaha | C40, 3-cylinder | 40 | 2-Stroke | 1997-2002 | 63D-W0078-01-00 |
| Yamaha | C50 | 50 | 2-Stroke | 1999-2001 | 63D-W0078-01-00 |
| Yamaha | F40 2.6L | 40 | 4-Stroke | 1999 | 63D-W0078-01-00 |
| Yamaha | F50 | 50 | 4-Stroke | 1995-2003 | 63D-W0078-01-00 |
| Yamaha | P50 | 50 | 2-Stroke | 1995-1996 | 63D-W0078-01-00 |
| Yamaha | F60 | 60 | 4-Stroke | 2002-2003 | 63D-W0078-01-00 |
Technical Specs
- Product Type
- Water pump repair kit with housing
- Installation Location
- Outboard lower unit
- Kit Configuration
- Housing included
- Reference OEM Part No.
- 63D-W0078-01-00
- Reference Aftermarket Part No.
- Sierra 18-3415
What's in the Box
- 1 x Water pump housing — OEM reference 63D-44311-00-00
- 1 x Water pump impeller — OEM reference 697-44352-00-00
- 1 x Wear plate — OEM reference 63D-44323-00-00
- 1 x Impeller key — OEM reference 90280-03M03-00
- 1 x Insert cup — OEM reference 63D-44322-00-00
- 1 x Pump case gasket — OEM reference 63D-44316-00-00
- 1 x Set of 4 pump housing bolts — OEM reference 90119-08M15-00
- 4 x Bolt washers — OEM reference 90209-08M02-00
- 1 x Water pump housing cover — OEM reference 63D-44312-00-00
- 1 x O-ring — OEM reference 93210-59MG7-00
- 1 x Water seal — OEM reference 663-44366-00-00
Installation Notes
- Verify the engine model, year, stroke and serial-number information before beginning work.
- Disconnect the battery where applicable and place the outboard in neutral.
- Remove the lower unit according to the engine manufacturer's service procedure.
- Remove the existing water pump housing and pump components.
- Clean the mating surfaces and remove old gasket material, debris and corrosion.
- Install the gasket, wear plate, impeller key, impeller and insert cup in the correct order.
- Fit the housing cover, O-ring, water seal and new housing, then tighten the bolts to the manufacturer's specified torque.
- Reinstall the lower unit, ensuring correct driveshaft and shift-shaft alignment.
- Refill the gearcase with the specified lubricant if required by the service procedure.
- Run the engine with an appropriate water supply and confirm a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm compatibility?
Read the model and serial information from the identification plate on the transom-clamp bracket or engine. Match the complete model, horsepower, stroke and year combination to the compatibility table; horsepower by itself is not sufficient.
What are common signs of a worn water pump impeller?
A weak or missing tell-tale stream, overheating warnings, reduced cooling performance and cracked, hardened or damaged impeller vanes are common signs that the water pump requires service.
Does this kit include the housing?
Yes. This configuration is the water pump repair kit with housing and includes the water pump housing listed in the package contents.
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