Sierra 18-0583 Marine Oil Seal, Replaces 26-43035, 1.063 Inch Shaft

The Sierra 18-0583 Marine Oil Seal is a precision-machined replacement seal designed for outboard and stern drive gearcase and drive applications, including Honda outboard gearcase and drive service. It seals the shaft bore to keep gear lubricant contained and water out, protecting internal gearcase components from contamination and lubricant loss. The seal is built to meet or exceed the performance of the original equipment part it replaces, making it a reliable choice for gearcase rebuilds, lower unit service, and routine maintenance.

With an outer diameter of 1.496 inches (38 mm), a shaft size of 1.063 inches (27 mm), and a width of 0.197 inches (5 mm), the 18-0583 is sized for a specific gearcase bore and shaft combination, so confirming these dimensions against your existing seal or service manual before ordering is recommended. The seal carries a machined exterior finish for a consistent, reliable fit during installation.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0583
• Outer Diameter: 1.496 inches (38 mm)
• Shaft Size: 1.063 inches (27 mm)
• Width: 0.197 inches (5 mm)
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.02 pounds
• Exterior Finish: Machined
• UPC: 808282242732
• OEM Cross-Reference: 26-43035
• Category: Honda Outboard Gearcase and Drive Parts

Fitment

Designed for outboard gearcase and drive applications, including Honda outboard gearcase and drive service. Confirm the outer diameter, shaft size, and width against your unit before ordering.

Replaces (OEM)

• 26-43035

Frequently Asked Questions

What does the Sierra 18-0583 oil seal fit? The Sierra 18-0583 is built for outboard gearcase and drive applications, including Honda outboard gearcase and drive service, and it should be matched to your unit by outer diameter, shaft size, and width before ordering.

What size is the 18-0583 oil seal? It measures 1.496 inches (38 mm) outer diameter, 1.063 inches (27 mm) shaft size, and 0.197 inches (5 mm) width.

Does the Sierra 18-0583 replace OEM part 26-43035? Yes, the Sierra 18-0583 is the cross-reference equivalent to OEM part number 26-43035.

How much does the 18-0583 oil seal weigh? This oil seal weighs 0.02 pounds.

Is the Sierra 18-0583 a genuine OEM part or aftermarket? It is a Sierra-brand aftermarket replacement seal engineered to meet or exceed the performance of the original equipment part it replaces, identified by OEM cross-reference 26-43035.

What finish does the 18-0583 seal have? The Sierra 18-0583 has a machined exterior finish for a consistent, reliable fit during installation.

Can I use the 18-0583 seal for a gearcase rebuild? Yes, this seal is commonly used in gearcase and lower unit rebuilds and routine drive maintenance.

What is included when I order the 18-0583? Each order includes one Sierra 18-0583 marine oil seal.

What category of parts does the 18-0583 belong to? The Sierra 18-0583 is categorized as a Honda outboard gearcase and drive part.

How do I confirm the 18-0583 is the correct seal for my gearcase? Compare the outer diameter (1.496 inches), shaft size (1.063 inches), and width (0.197 inches) of the 18-0583 against the seal currently installed in your gearcase or drive.