BEST way is to put boat in water, start engine, push throttle forward while skiing and wakeboarding for a few hours. :reddevil:
I have a sneaky feeling you need to get it out because it isn't running. :ack:
Siphon it out? Maybe disconnect the fuel line and hook up a cheap fuel pump from the auto parts store and hook the leads to the battery and pump it out (my personal preference)? Add some fuel line to the end of the fuel line, make it long enough that you can run it out the back drain hole, and put a catch can below the boat and let gravity do it's work?
There should be several ways to do it. Steer clear of anything that requires blow torch or firecrackers.