YAMAHA INTAKE VALVE 67D-12111-00 PA166F-010001

Function and technical context

The intake valve is an essential component of the timing system that regulates the flow of the air-fuel mixture into the combustion chambers of the marine engine. Its opening and closing, controlled by the camshaft according to the work cycle, determine the optimal filling of the cylinders at each stage of operation. In Yamaha engines, this valve must maintain an absolute hermetic seal to preserve the necessary compression and prevent pressure leaks that reduce power and propulsive performance.

When to replace this part?

Intake valve wear is detected by progressive loss of engine power, difficulty in cold starts or irregular and unstable running. It is advisable to inspect the condition of the valves during each seasonal inspection, especially after periods of intense use or prolonged inactivity; A preventive replacement avoids unexpected failures in navigation and extends the useful life of the distribution assembly.

Equivalent manufacturer part numbers