Hi there

Another alternative to get it up and running short term or long if you don't want to play with wires is that you can purchase a transformer 120v to 240v, and check the schematic for peak amps in the ball park of 140amps but this is based on my Surf Champ. Jaycar Electronics sells these for about $125.

US plug in one end and then Aus 240V out the other end.

Cheers