PRODUCT DETAILS
Drive Shaft Oil Seal for Mercury Mariner Outboards
Restore the watertight seal of your outboard gearbox with this premium-quality aftermarket Drive Shaft Oil Seal, designed for selected Mercury and Mariner 2-stroke and 4-stroke outboards.
Manufactured to OEM specifications, this seal helps prevent water entering the gearbox and gear oil leaking from the drive shaft.
This is the gearbox drive shaft oil seal.
It is NOT the crankshaft oil seal.
Fits Mercury & Mariner Outboards
2-Stroke Models
- 4 HP
- 5 HP
4-Stroke Models
- 4 HP
- 5 HP
- 6 HP
Seal Dimensions
- 10 mm × 24 mm × 8 mm
Replaces Mercury / Mariner Part Number
- 26-16162
OEM part numbers are used for reference only.
Features
- Premium marine-grade aftermarket oil seal
- Manufactured to OEM specifications
- Direct replacement
- Prevents water entering the gearbox
- Helps prevent gear oil leaks
- Oil and wear-resistant rubber
- Suitable for freshwater and saltwater use
Why Replace the Drive Shaft Oil Seal?
A worn or damaged drive shaft seal can cause:
- Water entering the gearbox
- Gear oil leaks
- Milky gearbox oil
- Premature bearing wear
- Gearbox damage
- Expensive lower unit repairs
Replacing the seal during gearbox servicing helps protect your outboard and extend gearbox life.
Why Buy From SSI Marine?
- Premium marine-grade aftermarket parts
- Workshop-tested by SSI Marine
- UK stock ready for immediate dispatch
- Same working day dispatch before 1 PM (Monday–Friday)
- Royal Mail Tracked 24 delivery
- Technical support from experienced outboard specialists
- Collection available from our Leigh, Manchester workshop
Buyer Responsibility
Please check your engine model, year and existing part number before ordering.
Although this seal may look identical to others, Mercury used different seal sizes across its engine range.
If you are unsure, send us your engine model and serial number and we will be happy to confirm compatibility before purchase.
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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