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

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.