New to the forum. We just bought an 02 gti le. When I bought it the guy started it up for me and it had no problems. He had to take a battery out of his 4wheeler because the one in it was dead but it started right up and ran great. It has a new sbt engine with about 30 hrs on it. Here is my problem. I charged the dead battery he gave me with it and put it in and got the beeps, tried to start it and it turned over a couple of times but the battery didn't have enough of a charge to crank it more than a couple of turns before it went dead. I disconnected the battery and charged it again.When I was re-connecting the battery cables as I connected the positive wire the starter engaged and began turning the motor (no key attached and no beeps). I have taken the start/stop switch out and it is fine. I have looked all through the engine compartment and there are no loose wires or corroded cables etc. Anyone experienced this before? This is my first pwc, I have had and worked on 2stroke dirt bikes all of my life so I am mechanically sound just not familiar with the seadoo setups. Any help would be appreciated.