for Evinrude Johnson OMC Motors 20 30 35 HP Outboard O-Ring Seal 311338 0311338

O-Ring Seal for Evinrude Johnson OMC

This O-ring seal, cross-referenced as 311338 and 0311338, fits Evinrude, Johnson, and OMC outboard motors of 20, 30, and 35 horsepower. It ensures a leak-proof seal in the oil pump or other fluid passages.

Overview

This O-ring seal for Evinrude Johnson OMC is a direct replacement for worn or damaged seals, maintaining proper oil pressure and preventing leaks. Designed for outboard motors in the 20, 30, and 35 horsepower range, it matches OEM cross-reference numbers 311338 and 0311338. The seal fits standard applications across these engines, ensuring reliable performance.

Built For Performance

• Precision-molded to match OEM specifications for a tight fit
• Resistant to oil, fuel, and marine environment exposure
• Maintains flexibility at low and high temperatures
• Prevents oil leaks that can cause engine overheating or failure
• Simple installation with basic hand tools

Fits These Machines

• for Evinrude 20 HP
• for Evinrude 30 HP
• for Johnson 35 HP
• for OMC 20 HP
• for OMC 30 HP
• for OMC 35 HP

On-The-Job Use

• Replaces worn O-rings during outboard engine service
• Used in oil pump and oil line repair scenarios
• Commonly installed by marine mechanics during tune-ups
• Helps restore optimal engine performance and longevity

Specs At A Glance

Good To Know

Q: Will this O-ring fit my 25 HP outboard? A: This seal is listed for 20, 30, and 35 HP models; if your engine has a different horsepower, verify the part numbers and dimensions before ordering.

Q: How often should I replace this O-ring? A: Replace it whenever you service the oil pump or if you notice oil seepage around the seal. Inspect it during annual maintenance.

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