49cc - starts and dies

[tcthomp66]

Actually, I found a youtube video that helped with that. The prior owner had swapped the intake manifold line with the output fuel line. This meant that when he could force fuel through the petcock it was going directly into the crankcase. (I've already changed the oil.)

The new problem just happened about 15 min ago. I have been fighting some carb issues, and just got the air/fuel mix to behave (about 5.5 turns out). I was riding up the the corner store when I got a loud clang and lost all power. Given the issues with fuel in the oil, I'm hoping for just a blown seal. There is no dripping anywhere, and no fuel in the oil. When I try to turn the engine over, I hear the starter motor but nothing else. Any suggestions?