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.

Mercury Mariner Outboard 4 HP 5 HP 6 HP Drive Shaft Oil Seal Gearcase Seal Replaces 26-16162