RE: Hydrolock Help!
I had the same problem with my RC10GT a couple days ago.....(hydrolock is when the pull start won't pull because the piston is stuck in the cylinder, right?)
I ended up taking off the head and sliding the cylinder out and cleaning it up with some fine grade emory cloth.....for some reason the piston kept getting stuck when it got to the top of the cylinder.
I cleaned it for about 15 mins, put it back in and it was still sticking - but I could tell it wasn't as bad, so I cleaned it for about 15 more mins and it worked.