YAMAHA EXHAUST SEAT 6AH-41137-005B

Function and technical context

The exhaust seat is a critical structural component of the exhaust system in Yamaha marine engines. This element provides support and correct alignment of the exhaust pipe, ensuring that combustion gases are properly channeled to the outlet without internal leaks or deviations that compromise performance. A defective or deteriorated seat causes excessive vibrations in the exhaust assembly, misalignment of ducts and potential entry of cooling water into the evacuation circuit, which generates accelerated corrosion and loss of engine thermal efficiency.

When to replace this part?

It is advisable to inspect the condition of the exhaust seat during each seasonal maintenance or after 300-400 hours of operation. Typical symptoms of wear include unusual vibrations in the engine block, metallic noises in the exhaust area, visible cracks in the seat or abnormal movements of the exhaust pipe during idling. Replacing this part preventatively prevents complex exhaust system breakdowns and protects against premature corrosion caused by water infiltration, especially on boats operating in salt water.

Equivalent manufacturer part numbers