You will probably have to change at least one if not both plugs. There are three possible plugs you will find on a marina dock
in the US, 125V 30 amp, 125V 50 amp, or 125/250V 50 amp. Each one is a little different. You can see diagrams of each on page 5 at this link http://www.marinco.com/files/media/g...#39;sGuide.pdf
The 125V 30 amp and 125/250V 50 amp are by far the most common. The 125V 50 amp is becoming rare.
You can buy plugs from any marine
store and change over the cord if it's a good cord, heavy gauge, etc. Will need 3 wires for the 125V and 4 wires for the 250V plug