On my one, the flywheel is held down by a single bolt. The coil sits on top of the carby and is held down by 3 long screws that also hold down the carby, there is a little bit of give but not much. I'm wondering, should you get a spark by spinning the flywheel or do you need to use the starter cord at greater velocity to generate a spark, is there a way to test that the coil is set right without having to assemble the whole thing first as it's such a pain to have to re-assemble?