Replaces OMC Johnson Evinrude 334950 Prop Shaft Seal Sierra 18-8367 2Pcs

Prop Shaft Seal for OMC Johnson Evinrude

This prop shaft seal for OMC Johnson Evinrude outboards is a direct replacement for OEM part 334950 and cross-references Sierra 18-8367, effectively preventing water and gear oil leaks around the propeller shaft.

Overview

This prop shaft seal is a precision-molded rubber seal that fits OMC Johnson Evinrude lower units, replacing worn or damaged seals to stop leaks. It is a reliable aftermarket alternative to the OEM 334950, also matching Sierra 18-8367. Each pack includes two seals for a complete repair or spare.

Built For Performance

• Made from nitrile rubber for oil and water resistance
• Precision-engineered to maintain proper sealing pressure
• Meets or exceeds OEM specifications
• Includes 2 pieces for a full lower unit service or backup
• Resists abrasion and wear from propeller shaft rotation

On-The-Job Use

• Used during lower unit rebuilds or when replacing the propeller shaft
• Commonly installed on fishing boats, pontoon boats, and runabouts with OMC Johnson Evinrude outboards
• Prevents water intrusion that can damage gears and bearings
• Essential for maintaining proper gear oil lubrication

Specs At A Glance

Good To Know

Q: Is this seal exactly the same as the OEM 334950? A: It is an aftermarket replacement designed to match the dimensions and performance of the original, with identical cross-reference to Sierra 18-8367.

Q: Can I use this seal on a 2-stroke and 4-stroke outboard? A: It is designed for OMC Johnson Evinrude lower units, which include both 2-stroke and certain 4-stroke models, but always verify your serial number.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.