If the fuel system was completly drained it will take 25 pulls to start to pump it up.
If you are running the sled say 45 mph and hit the kill switch while moving, it will suck the rails dry and take forever to pump it back up.
Take the plugs out and squirt some premix in the holes and start it that way.
It may take a couple trys to get it running again.
If it looks stock...... It must be ???????