Water Pump Impeller Kit 682-W0078-A3 18-3148 for Yamaha 8 9.9 15 HP Outboard
Water Pump Impeller Kit 682-W0078-A3 18-3148 for Yamaha 8 9.9 15 HP Outboard
Product Overview
Water pump impeller kit for Yamaha 8 HP, 9.9 HP and 15 HP outboards, supplied as 1 x impeller with insert cup, wear plate, damper, 2 gaskets, key and 4 bolts. It replaces Yamaha 682-W0078-A3, 682-W0078-A2, 682-W0078-A1, 682-W0078-00 and 682-W0078-01, plus Sierra 18-3148. A worn impeller shows up as a weak telltale, overheating at idle, or cracked and set blades when the housing comes off.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Water Pump Impeller Kit |
| Engine Type | Yamaha outboard |
| Horsepower Range | 8 HP - 15 HP |
| Kit Type | Complete water pump kit |
| Warranty | Standard |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Yamaha | 682-W0078-A3, 682-W0078-A2, 682-W0078-A1, 682-W0078-00, 682-W0078-01 |
| Yamaha (impeller) | 682-44352-01 |
| Yamaha (insert cup) | 682-44322 |
| Yamaha (wear plate) | 682-44323 |
| Sierra | 18-3148 |
Compatible Engines
Fits the following Yamaha outboards:
| Brand | HP |
|---|---|
| Yamaha | 8 HP |
| Yamaha | 9.9 HP |
| Yamaha | 15 HP |
What's Included
| Component | Qty |
|---|---|
| Impeller | 1 |
| Insert Cup | 1 |
| Wear Plate | 1 |
| Damper | 1 |
| Gasket | 2 |
| Key | 1 |
| Bolt | 4 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model and serial number before ordering
- Fits Yamaha 8, 9.9 and 15 HP outboards
- Check the pump housing and stainless cup for scoring while it is apart
- Renew both gaskets with the impeller — reused ones usually weep
- 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.