i belive the 407 has the same kit as the md 600 they also have problems with the igniter box when they start giving problems they will start a few times then stop
if you bang on the top of the igniter box you are liable to get a few extra starts just like you also used to do with your starter motor on the car
i have manually started the 600 without any problems you just need to be carefull but thats a different fault altogether
mark