Sierra 18-8353 Marine Exhaust Housing Rubber Seal for Johnson/Evinrude

The Sierra 18-8353 is a precision-engineered rubber seal designed for the exhaust housing on Johnson and Evinrude outboard motors. This seal creates a critical barrier between the gearcase and inner exhaust housing, preventing water intrusion and exhaust leaks that can compromise engine performance.

Key Features:

• Direct replacement for OMC part number 320961
• Constructed from durable rubber material for long-lasting reliability
• Precision-built to meet or exceed OEM specifications
• Compatible with V4 and V6 OMC outboard motors
• Also interchangeable with GLM 85840

This exhaust seal plays a vital role in maintaining proper exhaust system integrity on your outboard motor. Sierra Marine parts are manufactured to exacting standards, ensuring a proper fit and reliable performance in demanding marine environments. Regular replacement of exhaust seals during lower unit service helps prevent costly water damage and maintains optimal engine operation.