won't start....

OK, I heard back from the builder. He said they used an insulated comb which is for the 3 prong NSS. He did note that it will work with a 66-69 single prong switch, but not other single prong switches. My new single prong switch did look different than my old single prong switch, perhaps I have the wrong one. Regardless, I'll test it today and see if that is the issue.