PRODUCT DETAILS
STAINLESS STEEL IMPELLER HOUSING
FOR MERCURY / MARINER OUTBOARD
25HP 30HP 40HP 50HP
2 STROKE & 4 STROKE MODELS
High-quality stainless steel impeller housing, ideal for restoring water pump performance on a range of Mercury and Mariner outboards. Designed to replace the factory plastic housing for increased durability, corrosion resistance, and long service life.
Fits the following outboard types:
4-STROKE MODELS:
• 25 HP BigFoot (1998–2005)
• 30 HP – 3 cylinders
• 40 HP – 3 cylinders
• 50 HP – 4 cylinders (non-BigFoot)
2-STROKE MODELS:
• 30 HP – 2 Cyl, single carb (1995 and up, excluding serials starting with 0N0...)
• 40 HP – 2 & 3 Cyl (1995 and up)
• 50 HP – 3 Cyl (1998 and up, non-BigFoot)
Will fit only models with gear housing – drive shaft 2:1 gear ratio. Standard gearbox only. Not compatible with BigFoot models- except 25 hp
Replaces Mercury Part Number:
46-821351A3
Please check compatibility before purchasing.
It is the buyer’s responsibility to ensure the part is correct for their engine.
If unsure, contact us — our SSI Marine team is happy to help.
ALL ITEMS ARE IN UK STOCK
FAST DISPATCH – SAME DAY ON ORDERS BEFORE 1 PM
TRUSTED MARINE PARTS SUPPLIER
SHIPPING & DELIVERY
Delivery & Returns Policy
Delivery
Standard Delivery
- £6: Royal Mail Tracked 24 Service
- £3.99: Large Letter - Royal Mail 1st Class Post (Untracked)
We offer free delivery on all orders over £150 (excludes outboard engines).
Orders placed before 1:00 PM (Monday-Friday) are usually dispatched the same working day.
Most parcels are delivered within 24 hours, but please allow extra time for courier delays that may occur outside our control.
For outboard engines, please contact us for a delivery quote.
Important: Please ensure your shipping address is correct before completing checkout. SSI Marine is not responsible for parcels sent to an incorrect address provided by the buyer.
Tracking Your Order
Once your order has been dispatched, you will receive a tracking number via email (after 5 PM on the day of dispatch).
Tracking is available only for parcels sent via Royal Mail Tracked 24.
Large Letter orders are sent via Royal Mail 1st Class Post (untracked).
Returns
We accept returns of unused and undamaged items within 30 days of purchase.
Returned items must be in sellable condition and include the original packaging.
Please do not tape, label, or write directly on the product's original box.
Important: Do not return items in their original product boxes only, they must be placed inside a protective outer box or bag. Parcels returned like the example below will be subject to a 20% restocking fee.
Return shipping costs are the customer's responsibility.
Please include your order details and reason for return inside the parcel.
Refunds
Refunds are issued for the item purchase price only (shipping costs are non-refundable).
All refunds will be made using the same payment method as your original order.
Items returned in poor condition or without proper packaging may incur a 20% restocking fee.
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