Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke, F40/F50/F60 4-Stroke (Replaces Yamaha 63D-W0078-01-00)
Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke, F40/F50/F60 4-Stroke (Replaces Yamaha 63D-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke, F40/F50/F6...
Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke, F40/F50/F60 4-Stroke (Replaces Yamaha 63D-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke, F40/F50/F60 4-Stroke (Replaces 63D-W0078-01-00) provides a complete service solution for maintaining the cooling system on compatible Yamaha outboard motors. It is designed for Yamaha 40/50 HP 2-Stroke models (1994–2005) and F40/F50/F60 4-Stroke models (1996–2015).
It serves as a direct replacement for Yamaha OEM part 63D-W0078-01-00 and JLM Marine 17KY011, ensuring reliable fitment and performance.
- Engineered as a direct OEM-equivalent replacement.
- Constructed from marine-grade materials for durability in saltwater and freshwater.
- Includes all essential components for a complete water pump rebuild.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 63D-W0078-01-00 |
| JLM Marine | 17KY011 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit fits a wide range of Yamaha 2-stroke and 4-stroke outboard engines. Please verify your specific model and year before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40 | 40 | 2-Stroke | 1995–2005 | 63D-W0078-01 | |
| Yamaha | C40MLH | 40 | 2-Stroke | 2000–2003 | 63D-W0078-01 | |
| Yamaha | C40T, TLRZ | 40 | 2-Stroke | 1996–2003 | 63D-W0078-01 | |
| Yamaha | P40 | 40 | 2-Stroke | 1998 | 63D-W0078-01 | |
| Yamaha | 40V, VE | 40 | 2-Stroke | 1996–2003 | 63D-W0078-01 | |
| Yamaha | 40V, VE, VEO, VES | 40 | 2-Stroke | 1997–2015 | 63D-W0078-01 | |
| Yamaha | 40V, VMH | 40 | 2-Stroke | 1995–2015 | 63D-W0078-01 | |
| Yamaha | 50H, HMDO | 50 | 2-Stroke | 1995–2000 | 63D-W0078-01 | |
| Yamaha | 50H, HEM, HWH | 50 | 2-Stroke | 2000–2003 | 63D-W0078-01 | |
| Yamaha | C50TLR | 50 | 2-Stroke | 2000–2003 | 63D-W0078-01 | |
| Yamaha | C50 | 50 | 2-Stroke | 1998–2001 | 63D-W0078-01 | |
| Yamaha | P50 | 50 | 2-Stroke | 1995–1996 | 63D-W0078-01 | |
| Yamaha | T50 | 50 | 2-Stroke | 2002–2004 | 63D-W0078-01 | |
| Yamaha | F40A, ELH | 40 | 4-Stroke | 1999–2002 | 63D-W0078-01 | |
| Yamaha | F40CET | 40 | 4-Stroke | 2002 | 63D-W0078-01 | |
| Yamaha | F40D, DE, HE | 40 | 4-Stroke | 2006–2015 | 63D-W0078-01 | |
| Yamaha | F50TJR | 50 | 4-Stroke | 2003 | 63D-W0078-01 | |
| Yamaha | F50A, AE, TJ, T | 50 | 4-Stroke | 1997–2007 | 63D-W0078-01 | |
| Yamaha | F50DETL | 50 | 4-Stroke | 1995–2010 | 63D-W0078-01 | |
| Yamaha | F50F, FE, TR, TL | 50 | 4-Stroke | 2005–2012 | 63D-W0078-01 | |
| Yamaha | F50HED | 50 | 4-Stroke | 2013–2015 | 63D-W0078-01 | |
| Yamaha | FT50B, T50TLR | 50 | 4-Stroke | 1997–1999 | 63D-W0078-01 | |
| Yamaha | F60AE, TL, TJ | 60 | 4-Stroke | 2002–2007 | 63D-W0078-01 | |
| Yamaha | F60A, C, CET, TR, TJR | 60 | 4-Stroke | 2005–2012 | 63D-W0078-01 | |
| Yamaha | F60B, FET | 60 | 4-Stroke | 2013–2015 | 63D-W0078-01 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline (petrol)
- Housing Material
- Marine-grade materials
- Operating Temperature
- Marine operating range
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 2 (663-44366-00-00)
- 1 x Woodruff Key (90280-03024-00)
Installation Notes
- Disconnect the battery and remove the engine cowling.
- Drain the gearcase oil from the lower unit.
- Remove the bolts securing the lower unit to the engine's upper casing and carefully lower it.
- Locate the water pump housing on top of the lower unit and unbolt it.
- Remove the old impeller, gaskets, wear plate, and other components included in the kit.
- Clean all mating surfaces thoroughly, ensuring they are free of old gasket material and corrosion.
- Install the new components from the kit in the reverse order of removal. Lightly grease the new impeller.
- Ensure the impeller blades are oriented correctly (curved against the direction of rotation).
- Reinstall the water pump housing, torquing bolts to manufacturer specifications.
- Reattach the lower unit and refill with fresh gearcase oil.
- Reconnect the battery, start the engine, and verify a steady stream of water from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha engine?
This kit is designed for specific Yamaha 2-stroke (40/50 HP) and 4-stroke (F40/F50/F60) models. The best way to confirm fit is to check your engine's model and year against the compatibility table on this page. Matching your existing OEM part number (63D-W0078-01-00) is also a reliable method.
What are signs my water pump impeller is failing?
Common symptoms of a worn or failing impeller include a weak or intermittent water stream from the "tell-tale" outlet, the engine overheating at idle or low speeds, or a high-temperature alarm sounding. Visual inspection may reveal cracked, brittle, or missing impeller vanes.
How often should the water pump be serviced?
As a general rule, the water pump impeller should be inspected annually and replaced every 1-2 years or every 100-200 hours of operation, whichever comes first. Service intervals can vary based on usage conditions (e.g., frequent use in sandy or silty water may require more frequent replacement).
Is everything needed for a standard replacement included?
Yes, this is a comprehensive kit that includes the impeller, housing cover, cartridge, plate, gaskets, o-rings, bolts, and other key components necessary for a complete water pump service. You will not need to purchase these items separately.
Can I buy just the impeller instead of the whole kit?
While impellers are sometimes sold alone, it is highly recommended to replace all kit components simultaneously. The housing, wear plates, and seals wear out over time and can reduce the efficiency and lifespan of a new impeller if not replaced.
Is a special tool required for installation?
Standard mechanic's tools (wrenches, socket set) are typically sufficient for the job. A torque wrench is recommended to ensure bolts are tightened to the correct specifications, preventing leaks and damage.
What's the difference between this and an OEM part?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and reliable performance.
How fast do you ship?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
This kit is 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 if the item is unused and in its 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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
