Sierra 18-2653 Lower Unit Seal Kit, Replaces 26-55682A1, for Mercury/Mariner Outboard Gearcase

The Sierra 18-2653 Lower Unit Seal Kit is a gearcase reseal kit engineered for Mercury and Mariner outboard motors, built to restore a watertight, oil-tight lower unit during a gearcase rebuild or seal service. Sierra manufactures the kit to meet or exceed the original equipment part it replaces, so it is a direct, reliable substitute when the OEM seal kit is no longer available or when a shop prefers a proven aftermarket source. The kit is supplied as a complete set of gearcase seals and includes a rubber grommet (Sierra part 18-3110, O.E.# 26-38970) among its components, so a technician has the pieces needed to reseal the lower unit in a single service rather than sourcing individual seals separately.

Sierra parts are designed and tested to stand up to the harsh marine environment, resisting the effects of saltwater, fuel, and gear lubricant exposure over the life of the gearcase. This seal kit is intended for outboard owners, marine technicians, and repair shops performing lower unit maintenance, gearcase overhauls, or troubleshooting a leaking gearcase on Mercury and Mariner outboard motors.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2653
• Product Type: Lower Unit Seal Kit
• Application: Mercury/Mariner outboard motor gearcase
• Material: Rubber
• Color: White
• Shape: Round
• Weight: 0.28 pounds
• UPC: 030999312648
• Included Component: Grommet, Sierra 18-3110 (O.E.# 26-38970), Qty 1

Fitment

• Mercury outboard motors
• Mariner outboard motors

Replaces (OEM)

• 26-55682A1

Frequently Asked Questions

What does the Sierra 18-2653 Lower Unit Seal Kit include? The kit includes the gearcase seals needed to reseal a Mercury or Mariner outboard lower unit, including a rubber grommet (Sierra 18-3110, O.E.# 26-38970) as one of its components.

Which outboard motors is part number 18-2653 designed for? This seal kit is designed for Mercury and Mariner outboard motor lower units.

Does 18-2653 replace OEM part 26-55682A1? Yes, Sierra 18-2653 directly replaces OEM number 26-55682A1.

How much does the 18-2653 seal kit weigh? The Sierra 18-2653 Lower Unit Seal Kit weighs 0.28 pounds.

What material are the seals made from? The seals in kit 18-2653 are made of rubber.

What color is the 18-2653 seal kit? The components in this kit are white.

Is Sierra 18-2653 a genuine OEM part or an aftermarket replacement? 18-2653 is a Sierra aftermarket part manufactured to meet or exceed the original equipment part it replaces, rather than a Mercury-branded OEM part.

When would I need to install the 18-2653 seal kit? This kit is used during a lower unit gearcase rebuild or reseal service on a Mercury/Mariner outboard, such as when old seals are worn, leaking, or being replaced preventively.

What is the shape of the seal components in this kit? The seal components included in the Sierra 18-2653 kit are round.

Is the grommet included in 18-2653 a separate purchasable part? Yes, the grommet included in this kit is also sold individually as Sierra part 18-3110, with O.E.# 26-38970.

What is the UPC for the Sierra 18-2653 Lower Unit Seal Kit? The UPC for this kit is 030999312648.