Yamaha Water Pump Impeller Kit 63V-W0078 for 9.9 15 HP 2-Stroke 8 HP 4-Stroke Outboard
Yamaha Water Pump Impeller Kit 63V-W0078 for 9.9 15 HP 2-Stroke 8 HP 4-Stroke Outboard
Product Overview
Yamaha water pump impeller repair kit for the 8 HP to 20 HP two-stroke and four-stroke outboards, built around the 63V-44352-01-00 impeller, the 63V-44323-00-00 wear plate and the 63V-44322-00-00 insert cup. It replaces Yamaha 63V-W0078-00, 63V-W0078-01, 63V-W0078-02, 63V-W0078-03 and 63V-W0078-04, plus Sierra 18-3433. Fits the 9.9 HP and 15 HP two-strokes from 1996 to 2009 and the 8 HP T8 four-stroke from 2001 to 2010. The kit carries the impeller, wear plate, insert cup, drive key, water seal and the cover bolts needed to rebuild the pump in one job.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Water Pump Impeller Repair Kit |
| Engine Type | Yamaha 2-stroke and 4-stroke outboard |
| Horsepower Covered | 8 HP, 9.9 HP, 15 HP, 20 HP |
| Model Years | 1996-2010 |
| Impeller | 63V-44352-01-00 |
| Wear Plate | 63V-44323-00-00 |
| Insert Cup | 63V-44322-00-00 |
| Warranty | 3 Year |
| Packaging | 15 x 10 x 4 cm (5.9 x 3.9 x 1.6 in) |
OEM Cross Reference
| Component | OEM Part Numbers |
|---|---|
| Yamaha — Complete Kit | 63V-W0078-00, 63V-W0078-01, 63V-W0078-02, 63V-W0078-03, 63V-W0078-04 |
| Yamaha — Impeller | 63V-44352-01-00 |
| Yamaha — Wear Plate | 63V-44323-00-00 |
| Yamaha — Insert Cup | 63V-44322-00-00 |
| Sierra | 18-3433 |
Compatible Engines
Fits the following Yamaha outboards:
| Stroke | Model | Years |
|---|---|---|
| 2-Stroke | 9.9 HP | 1996-2009 |
| 2-Stroke | 15 HP | 1996-2009 |
| 4-Stroke | 8 HP (T8) | 2001-2010 |
What's Included
| Component | Qty |
|---|---|
| Water Pump Impeller | 1 |
| Wear Plate | 1 |
| Insert Cup | 1 |
| Drive Key | 1 |
| Water Seal | 1 |
| Cover Bolts | 4 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 Year |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model or serial number before ordering
- Fits Yamaha 9.9 and 15 HP two-strokes 1996-2009 and the T8 8 HP four-stroke 2001-2010
- Kit covers the impeller, wear plate, insert cup, key, water seal and cover bolts
- Lubricate the impeller with soapy water before fitting
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
Couldn't load pickup availability

Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
What payment methods do you accept?
We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.