Thanks guys. The carby has 9009 C4D engraved on the mounting flange but I can't make head nor tails of that partstree site. Those numbers return a zero results in their search engine and trying to figure out which carby it is without knowing the engine designation seems impossible. There are no marking of any sort on the engine itself and the possible identifying sticker on the cowl has long ago bleached white. So if I grabbed that cheapie carby off ebay, it will probably be okay? The existing carby has no adjustments anywhere for mixture and the jet in the bottom of the bowl has 170 stamped into it.
