model #50ESL73R serial # E3827500. No spark on either cylinder. Some times it would start then the next time it wont, now I cant get it started. I did The CDI check the resistance on my stator is 870 ohms ( which is high to 500). Kill switch check didnt help. I think it might be the power pack does anyone know how to check them. I hate to spend $100 dollars and not know if thats it or not.