YAMAHA INJECTOR 6C5-13761-00

Function and technical context

The injector is a fundamental component of the fuel delivery system in Yamaha four-stroke engines. Its mission is to spray and distribute the fuel precisely in the combustion chamber at the exact moment of the intake cycle, guaranteeing a homogeneous and efficient air-fuel mixture. It works integrated into the intake manifold under electronic control, coordinated with the engine management unit (ECU). A defective injector causes irregular combustion, significant loss of power, excessive fuel consumption and increased polluting emissions, affecting both the performance and reliability of the boat.

When to replace this part?

The characteristic symptoms of an injector failure include unstable idling, jerks during acceleration, difficulty in cold starting and abnormal increase in fuel consumption. Although modern injectors have a long life, it is recommended that they be inspected during each seasonal maintenance and replaced proactively if inconsistent pressure readings are detected or if the engine experiences recurring misfires. An early replacement avoids unforeseen navigation breakdowns and keeps power and fuel economy performances within specifications.

Equivalent manufacturer part numbers