Mercury MerCruiser Owner's Manual page 52

Section 3 - On the Water
The joystick is proportional, which means that the greater distance from the center that the
joystick is moved, the more thrust that is applied to the boat in that direction, to move the
boat.
The computer control system automatically attempts to dampen bow swinging during
joystick operation. If the joystick is not twisted, the computer measures the yaw rate of the
boat and actively counteracts the yaw motion of the boat.
For joystick movement of the boat:
1. Both engines must be running for the Joystick to operate.
2. For best control, trim both drives to the full down position.
3. Move both electronic remote control (ERC) levers to the neutral position.
4. Move the joystick in the direction that you want the boat to move, or twist the joystick
in the direction that you want the boat to rotate. The joystick can be moved and rotated
at the same time.
The following table gives some limited examples of the basic responses to inputs from the
joystick.
Maneuvering with the Joystick
Page 44
Joystick Input
24705
24706
Boat Response
(shown from light gray to dark gray)
Boat moves forward
Boat moves aft
90-899883295 JUNE 2008
Movement
25928
25927