821354A2 Water Pump Impeller Kit For Mercury Mariner Outboard 25 30 40 50 HP — Australia Local Warehouse
821354A2 Water Pump Impeller Kit For Mercury Mariner Outboard 25 30 40 50 HP — Australia Local Warehouse
Product Overview
Complete water pump repair kit for Mercury and Mariner 4-stroke outboards from 25 HP to 50 HP. Replaces OEM 821354A2 / 821354A1 (Sierra 18-4531) and supplies every wear component of the water pump, so the pump can be rebuilt in a single service rather than part by part. Dispatched from our Australia local warehouse.
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Mercury Marine | 821354A2, 821354A1 |
| Sierra | 18-4531 |
Compatible Engines
- Mercury / Mariner 4-Stroke 25 HP
- Mercury / Mariner 4-Stroke 30 HP
- Mercury / Mariner 4-Stroke 40 HP
- Mercury / Mariner 4-Stroke 50 HP
- 2-cylinder 30 HP and 40 HP
- 3-cylinder 40 HP and 50 HP
- 50 HP Bigfoot
What's Included
| Component | Qty |
|---|---|
| Impeller | 1 |
| Wear Plate (stainless steel) | 1 |
| Key | 1 |
| Seal, short 1-3/4 in | 1 |
| Seal, long 2-1/4 in | 1 |
| Gasket | 2 |
| Upper Water Pump Gasket | 1 |
| Lower Water Pump Gasket | 1 |
Before You Buy
- Verify your engine model or serial number before ordering
- 30-Day Easy Returns
- Free Shipping Across Australia from Our Local Warehouse
- OEM Quality Without the Markup
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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.