One thing I'm not clear on by the exploded parts diagram on the central hobbies website. # 73 the Regulator Balast. I don't see that on my engine.
Either my buddy took it off and lost it, It was removed and lost back in 1998 the first time it was reworked or it never had it.
David,
This won't help you getting the engine to run but as I recall the ballast was added to later models to make the engine run the same inverted as upright. I don't believe it is a critical part.
Allan