Final answer:
The primary control setting difference between a flooded start and a normal start on the Seminole is that the fuel pump is off during a flooded start. This is important to prevent excess fuel from entering the engine and causing flooding.
Step-by-step explanation:
In the Seminole aircraft, the primary control setting differences between a flooded start and a normal start involve the fuel pump being off during a flooded start.
In a normal start, the fuel pump is turned on to supply fuel to the engine. However, in a flooded start, the fuel pump is kept off to prevent excess fuel from entering the engine.
This difference is important because too much fuel in the engine can cause flooding and make it difficult for the engine to start properly.