Water Pump Impeller Kit 6J8-W0078-A1 18-3430 for Yamaha 25 30 HP 2-Stroke Outboard
Water Pump Impeller Kit 6J8-W0078-A1 18-3430 for Yamaha 25 30 HP 2-Stroke Outboard
Product Overview
Water pump impeller repair kit for Yamaha 25 HP and 30 HP two-stroke outboards, supplied as 1 x impeller with insert cup, wear plate, 3 gaskets, 4 bolts and 4 washers. It replaces Yamaha 6J8-W0078-A1, 6J8-W0078-A2, 6J8-W0078-01 and 6J8-W0078-00, plus Sierra 18-3430. The impeller has 6 blades and measures 55.48 mm outside diameter. 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 two-stroke outboard |
| Horsepower Range | 25 HP - 30 HP |
| Number of Blades | 6 |
| Outside Diameter | 55.48 mm (2.18 in) |
| Warranty | 3 years |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Yamaha (kit) | 6J8-W0078-A1, 6J8-W0078-A2, 6J8-W0078-01, 6J8-W0078-00 |
| Yamaha (impeller) | 6H4-44352-02-00, 676-44352-01 |
| Yamaha (insert cup) | 663-44322-00-00 |
| Yamaha (wear plate) | 663-44323-00-00 |
| Sierra | 18-3430, 18-3040 |
Compatible Engines
Fits the following Yamaha two-stroke outboards:
| Brand | HP |
|---|---|
| Yamaha | 25 HP |
| Yamaha | 30 HP |
What's Included
| Component | Qty |
|---|---|
| Water Pump Impeller | 1 |
| Insert Cup | 1 |
| Wear Plate | 1 |
| Pump Gasket | 3 |
| Bolt | 4 |
| Washer | 4 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 years |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model and serial number before ordering
- Fits Yamaha 25 and 30 HP two-stroke outboards
- Check the pump housing and stainless cup for scoring while it is apart
- Renew all gaskets with the impeller — reused ones usually weep
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
Verfügbarkeit für Abholungen konnte nicht geladen werden
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.
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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.
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