What is the recommended action during a hot start to prevent torching?

• A. Motor the engine with the fuel supply cut OFF
• B. Increase fuel flow
• C. Shut down and restart after cooling
• D. Ignite the fuel-air mix with spark plug

Answer: (A)

During a hot start, the risk is that residual fuel can ignite on the overheated cylinders or valves, causing torching. The best move is to motor the engine with the fuel supply cut off. Cranking without fuel lets the engine spin and purge or cool the hot spots without creating an ignitable fuel-air mixture, reducing the chance of ignition. Once the engine has cooled and the cylinders are cleared, you can attempt a normal start with fuel supplied. Adding more fuel or trying to ignite the mixture would increase the risk of torching, and simply shutting down to wait would waste time without addressing the immediate risk.