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A remote control device for controlling a watercraft propulsion device of a watercraft having an engine that generates propulsive power can have a plurality of remote control device side ECUs. All of the plurality of remote control device side ECUs can have the same construction. Each remote contro

A remote control device for controlling a watercraft propulsion device of a watercraft having an engine that generates propulsive power can have a plurality of remote control device side ECUs. All of the plurality of remote control device side ECUs can have the same construction. Each remote control device side ECU can have an ECU discriminating terminal section, an ECU determining section configured to determine a role of the respective remote control device side ECU based upon a signal provided from the ECU discriminating terminal section, and an exclusive use section configured to operate based upon a signal provided from the ECU determining section to execute a function corresponding to the role that is specifically assigned.

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What is claimed is: 1. A remote control device for controlling a watercraft propulsion system having at least one of a plurality of cockpits and a plurality of propulsion devices each of which have an engine that generates propulsive power, the remote control device comprising a plurality of remote

What is claimed is: 1. A remote control device for controlling a watercraft propulsion system having at least one of a plurality of cockpits and a plurality of propulsion devices each of which have an engine that generates propulsive power, the remote control device comprising a plurality of remote control device side ECUs, each remote control device side ECU having an ECU discriminating terminal section, an ECU determining section configured to determine a role of the respective remote control device side ECU based upon a signal provided from the ECU discriminating terminal section, and a plurality of exclusive use sections, each exclusive use section defining a role defined by a different combination of propulsion device mounting positions and cockpit priority, and each exclusive use section being configured to operate based upon a signal provided from the ECU determining section to execute a function corresponding to the role that is specifically assigned, wherein the plurality exclusive use sections include at least first, second, third, and fourth exclusive use sections, the first exclusive use section defining role as a main remote control for a propulsion unit positioned on a right side of the watercraft, the second exclusive use section defining a role as a main remote control for a propulsion unit positioned on a left side of the watercraft, the third exclusive use section defining a role as an auxiliary remote control for a propulsion unit positioned on a right side of the watercraft, the fourth exclusive use section defining a role as an auxiliary remote control for a propulsion unit positioned on a left side of the watercraft. 2. The remote control device of claim 1, wherein each remote control device side ECU has a plurality of the ECU discriminating terminal sections, each ECU discriminating terminal section being connected to or disconnected from a power source or a ground such that connecting conditions of the respective ECU discriminating sections of each remote control device side ECU differ from connecting conditions of every other remote control device side ECU, whereby the ECU determining section determines the role of the particular remote control device side ECU based upon the connecting conditions. 3. The remote control device of claim 2, wherein the ECU determining sections determine the role of the respective remote control device side ECUs based upon combinations of a plurality of signals which differ from each other and which are provided from the plurality of the ECU discriminating terminal sections. 4. The remote control device of claim 2, wherein the plurality of remote control device side ECUs correspond to a plurality of the propulsion devices. 5. The remote control device of claim 4, configured to control a watercraft having a plurality of cockpits, each cockpit having a respective remote control device side ECU. 6. The remote control device of claim 2, configured to control a watercraft having a plurality of cockpits, each cockpit having a respective remote control device side ECU. 7. The remote control device of claim 1, wherein the plurality of remote control device side ECUs correspond to a plurality of the propulsion devices. 8. The remote control device of claim 7, configured to control a watercraft having a plurality of cockpits, each cockpit having a respective remote control device side ECU. 9. The remote control device of claim 1, configured to control a watercraft having a plurality of cockpits, each cockpit having a respective remote control device side ECU. 10. The remote control device of claim 9, in combination with a watercraft. 11. The remote control device of claim 1, wherein all of the plurality of remote control device side ECUs have the same construction. 12. The remote control device of claim 1, in combination with a watercraft. 13. The remote control device of claim 1, wherein each exclusive use section defines a different role defined by a unique combination of propulsion device positions and cockpit priority, wherein cockpit priority is defined as either a main cockpit or an auxiliary cockpit. 14. A remote control device side ECU, comprising an ECU discriminating terminal section, an ECU determining section configured to determine a role of the remote control device side ECU based upon a signal provided from the ECU discriminating terminal section, and a plurality of exclusive use sections, each corresponding to a different role defined by a different combination of propulsion device mounting position and cockpit priority, and each of the plurality of exclusive use sections being configured to operate based upon a signal provided from the ECU determining section to execute a function corresponding to the role that is specifically assigned, wherein the plurality exclusive use sections include at least first, second, third, and fourth exclusive use sections, the first exclusive use section defining a role as a main remote control for a propulsion unit positioned on a right side of the watercraft, the second exclusive use section defining a role as a main remote control for a propulsion unit positioned on a left side of the watercraft, the third exclusive use section defining a role as an auxiliary remote control for a propulsion unit positioned on a right side of the watercraft, the fourth exclusive use section defining a role as an auxiliary remote control for a propulsion unit positioned on a left side of the watercraft. 15. A remote control device for controlling a watercraft propulsion device, comprising a plurality of remote control device side ECUs having substantially the same construction, each remote control device side ECU being capable of performing multiple roles, each of the roles being defined by a different combination of propulsion device mounting position and cockpit priority, and having means for determining which of the roles is to be performed by that remote control device side ECU, the remote control side ECUs are configured to perform at least first, second, third, and fourth roles, the first role being defined as a main remote control for a propulsion unit positioned on a right side of the watercraft, the second role being defined as a main remote control for a propulsion unit positioned on a left side of the watercraft, the third role being defined as an auxiliary remote control for a propulsion unit positioned on a right side of the watercraft, the fourth role being defined as an auxiliary remote control for a propulsion unit positioned on a left side of the watercraft. 16. The remote control device of claim 15, wherein the means for determining comprises an ECU discriminating terminal section and an ECU determining section configured to determine the role to be performed based upon a signal provided from the ECU discriminating terminal section and output a signal indicating the role to be performed. 17. The remote control device of claim 16, wherein the means for determining comprises a plurality of the ECU discriminating terminal sections configured to be connected to or disconnected from a power source or the ground. 18. The remote control device of claim 15, wherein each remote control device side ECU is capable of performing roles corresponding to a plurality of the propulsion devices. 19. The remote control device of claim 15, wherein each remote control device side ECU is capable of performing roles corresponding to a plurality of cockpits. 20. The remote control device of claim 15, wherein the means for determining determines the role of the remote control device side ECU based upon a combination of a plurality of signals. 21. The remote control device of claim 15, in combination with a watercraft propulsion device. 22. The remote control device of claim 15, wherein all of the plurality of remote control device side ECUs have the same construction.