PRODUCT DETAILS
Water Pump Impeller Repair Kit for Mercury / Mariner Outboards
High-quality water pump impeller repair kit designed for Mercury and Mariner outboards ranging from 25HP to 50HP. Suitable for both 2-stroke and 4-stroke models across various cylinder configurations. This kit restores proper water flow through the cooling system — essential for preventing engine overheating and extending engine life.
Fits the following Mercury / Mariner outboard models:
Will fit only models with gear housing – drive shaft 2:1 gear ratio. Standard gearbox only. Not compatible with BigFoot models - excelpt 25 hp
4-Stroke Models:
• 25HP BigFoot (1998–2005)
• 30HP 3 Cyl, 3 Carbs
• 40HP 3 Cyl, 3 Carbs
• 50HP 4 Cyl, 4 Carbs (1.83:1 / 2:1 Gear Ratio, non-BigFoot)
2-Stroke Models:
• 30HP 2 Cyl, single carb (1995 and up, excluding engines with serial numbers starting with 0N0...)
• 40HP 2 Cyl, single carb (1995 and up)
• 40HP 3 Cyl, 3 Carbs (1995 and up)
• 50HP 3 Cyl, 3 Carbs (1998 and up, non-BigFoot)
Replaces Mercury Part Numbers:
821354A2, 821354A1, 821354A4
Product Features:
• Marine-grade aftermarket kit
• Includes impeller and essential pump repair components
• Helps restore cooling performance
• Built to OEM specifications
• Direct-fit replacement — easy to install
Please check compatibility before purchasing.
It is the buyer’s responsibility to ensure this part fits your engine.
Not sure? Message us — our SSI Marine team is happy to help!
Why Buy from SSI Marine?
• Quality marine parts at competitive prices
• UK stock — same-day dispatch before 1 PM
• Tracked 24-hour delivery
• Friendly, expert customer service
Order now from SSI Marine — trusted for reliable outboard parts and fast UK shipping.
SHIPPING & DELIVERY
Delivery:
We offer free shipping on all orders over £150 (excluded outboard engines, trailers)
Standard Shipping - £ 8.50
Orders are typically shipped within 1 business day of receipt of payment. We ship via Royal Mail Tracked 24 delivery service. Delivery times vary depending on the delivery destination.
For engines delivery cost please ask for a quote.
It is the buyer's responsibility to ensure that the correct shipping address is supplied.
All item(s) will be despatched to the registered address.
Tracking your order:
Once your order has been shipped, you will receive a tracking number via email. You can track your order online using the tracking number provided.
Returns:
We accept returns of unused and undamaged items within 30 days of purchase.
To return an item please contact us for a return authorisation number. Return shipping costs are the responsibility of the customer.
Refunds:
Refunds will be issued for the purchase price of the item, less shipping costs. Refunds will be issued in the same form of payment as the initial purchase.
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