Hi!
Did you have fuel inside the engine when you applied the electric starter? -It sure sounds that way! An engine which is dry inside is no problem to spin with the starter, providing you have a good 12V (7-10A) motor cycle battery (dry-lead) or...using a more modern14,8V LIpo ocr LiPoFe battery.
OS 8 or Enya 3 are both good glow plugs to use.