Which statement describes the correct priming position for a fuel-injected engine?

Which statement describes the correct priming position for a fuel-injected engine?

• A. Full rich
• B. Idle cutoff
• C. Auto rich
• D. Off

Answer: (A)

Priming a fuel-injected engine is about delivering extra fuel to the cylinders to help ignition, especially when starting a cold engine. Since there’s no choke in a fuel-injected system, the way you enrich the mixture for starting is to set the mixture control to full rich and use the primer to introduce more fuel. That extra fuel increases the chance the mixture will ignite reliably as the engine turns over. Choosing anything other than full rich would provide less fuel or, in some cases, reduce fuel delivery altogether, making starting harder or impossible. After start, you can adjust the mixture to the proper operating setting.

Priming a fuel-injected engine is about delivering extra fuel to the cylinders to help ignition, especially when starting a cold engine. Since there’s no choke in a fuel-injected system, the way you enrich the mixture for starting is to set the mixture control to full rich and use the primer to introduce more fuel. That extra fuel increases the chance the mixture will ignite reliably as the engine turns over. Choosing anything other than full rich would provide less fuel or, in some cases, reduce fuel delivery altogether, making starting harder or impossible. After start, you can adjust the mixture to the proper operating setting.