What happens to the engine if fuel is prevented from entering during start?

• A. The engine begins combustion
• B. The engine will not start
• C. Normal operational checks are bypassed
• D. The engine maintains idle speed

Answer: (B)

When fuel is prevented from entering the engine during startup, the engine will not start. This is because internal combustion engines require a mixture of fuel and air to ignite and create the combustion necessary for operation. Without fuel, there is no combustion reaction, which means the engine cannot generate the power needed to start and run.

The process of starting an engine involves the initiation of combustion within the cylinders, which is fundamentally dependent on the proper mixture of air and fuel. If fuel flow is interrupted or blocked, the necessary conditions for ignition and subsequent combustion are not met, resulting in the engine's inability to start.

Understanding this principle is key to troubleshooting engine start-up issues, as it highlights the critical role fuel plays in engine operation.