Pro Boat PRB3375 - Manual (Page 9)

9
 7. Check the operation of the propellers
in relationship to the throttle trigger.
When the trigger is pulled in, the right
propeller must rotate clockwise and the
left propeller will rotate counterclockwise
as shown. If not, follow the instructions
from the radio to set the servo reversing
for the throttle.
 8. Once the radio is installed and
operating properly, the main tower,
secondary tower and helicopter covers
can be placed in their respective positions
on the hull.