Sierra 18-2613 Outdrive Gasket Set - Replaces OMC 508105

The Sierra 18-2613 Outdrive Gasket Set is a complete kit for resealing the outdrive housing on applicable stern drive units. It bundles the three components needed to restore a proper seal at the outdrive mating surfaces: an outdrive gasket, an outdrive seal, and an O-ring, so installers do not have to source each piece separately. Using a fresh gasket set at reassembly helps prevent water intrusion and lubricant leaks at the outdrive housing joint, which is a common failure point during outdrive service or when the unit has been removed for repair.

This set directly replaces OMC part number 508105, making it a straightforward drop-in solution when the original equipment gasket set is no longer available or when performing routine maintenance. Each component in the kit corresponds to its own Sierra part number and original equipment number, so individual pieces can also be cross-checked against the original hardware being replaced. The set weighs 0.08 pounds and ships as a complete kit under a single part number, 18-2613.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2613
• Product Type: Outdrive Gasket Set
• Weight: 0.08 pounds
• Item Thickness: 0.25 millimeters
• Color: Multi-colored
• Unit Count: 1
• UPC: 030999312556
• OEM Cross Reference: 508105
• Kit Contents: Outdrive Gasket (O.E. 911836, qty 1), Outdrive Seal (O.E. 911823, qty 1), O-Ring (O.E. 911851)

Replaces (OEM)

• 508105

Frequently Asked Questions

What does the Sierra 18-2613 Outdrive Gasket Set include? The 18-2613 set includes an outdrive gasket (O.E. 911836), an outdrive seal (O.E. 911823), and an O-ring (O.E. 911851), giving you all three sealing components needed for one outdrive resealing job in a single kit.

Does the 18-2613 gasket set replace OMC 508105? Yes, Sierra 18-2613 is a direct replacement for OMC part number 508105.

How much does the 18-2613 gasket set weigh? The complete kit weighs 0.08 pounds.

What is the thickness of the gasket in this set? The gasket component in the 18-2613 set measures 0.25 millimeters thick.

Is this a genuine Sierra part or an aftermarket copy? The 18-2613 Outdrive Gasket Set is sold under the Sierra brand name and identified by Sierra part number 18-2613.

How many pieces come in one 18-2613 set? One 18-2613 set contains a single unit count consisting of the gasket, seal, and O-ring needed for one resealing job.

What is the UPC for the Sierra 18-2613 Outdrive Gasket Set? The UPC for this gasket set is 030999312556.

Can individual components of the 18-2613 set be identified separately? Yes, each piece in the 18-2613 kit has its own Sierra number: the outdrive gasket is 18-2918 (O.E. 911836), the outdrive seal is 18-2996 (O.E. 911823), and the O-ring is 18-7153 (O.E. 911851).

What color is the 18-2613 gasket set? The components in the Sierra 18-2613 set are multi-colored.

Why replace the outdrive gasket and seal together instead of individually? The 18-2613 set bundles the gasket, seal, and O-ring together so all three sealing surfaces on the outdrive housing are renewed at the same time during a single service job.