definitly check your connections first, but i wouldn't necessarily focus on strictly electrical. in the event that its not an electrical issue, you would still see an "electrical dieback" just before stalling because your "generator" has quit running.

has it always done this? if you keep your foot on the gas will it run? when was your last tuneup? has it sat for a while?

rolled it on a snowbank. now i'm not afraid to scratch it. liberation.