Removing the Skeg and Nose Cone
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Using a 4 mm hex bit or wrench, remove the four screws
that secure the skeg 
to the propeller drive motor.
-
Using a 4 mm hex bit or wrench, remove the two screws
that secure the front of the nose cone 
to the propeller drive motor.
-
Using a 3 mm hex bit or wrench, remove the single screw
that secures the bottom of the nose cone to the propeller drive motor.
You should keep all of these screws and parts in a safe place, because you must reinstall them when reassembling the skeg and nose cone.