What mixture setting is recommended during restart?

What mixture setting is recommended during restart?

• A. LEAN
• B. RICH
• C. IDLE
• D. CUT

Answer: (B)

During restart, you want the engine to have as much fuel as possible available for ignition. Setting the mixture to full rich provides the richest fuel/air mixture, increasing the likelihood of a reliable restart, especially if fuel vaporization or slight fuel starvation is present. Lean would make starting harder by restricting fuel, idle alone doesn’t supply enough fuel to start, and cutting off fuel would prevent ignition entirely. After the engine is running, you can progressively lean for cruise as appropriate.

During restart, you want the engine to have as much fuel as possible available for ignition. Setting the mixture to full rich provides the richest fuel/air mixture, increasing the likelihood of a reliable restart, especially if fuel vaporization or slight fuel starvation is present. Lean would make starting harder by restricting fuel, idle alone doesn’t supply enough fuel to start, and cutting off fuel would prevent ignition entirely. After the engine is running, you can progressively lean for cruise as appropriate.