This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to start a carbureted, electric start outboard motor
Check the oil level on four-stroke motors.
Make sure there is fuel in the tank and the fuel tank vent is open and clear.
Squeeze the primer bulb on the fuel line repeatedly until it is firm.

Possible answers: I. Apply the oil to the starter housing of the first carbureted motor and a blob of oil is inserted under the engine. Ensure one that is a light shade of green is on the oil surface and slightly darker at the oil pan oil plate.; II. Verify that fuel in the tank is in the tank with the oil level medium and suitable. Place the fuel tank onto another 3-stroke motor if it is at the operator area of the engine.; III. It may differ depending on what you are using the carbureter for. If it is not prime, use a matching amount.; IV. Move the throttle into the hi-idle position. On some controls, this is a lever beside the throttle/shift control that is lifted up far as it will go.;
The answer is:
IV.