I don’t have any money to be spending on the Scout right now, but one of the things on the to-do list is to rebuild a spare carburetor. I have two spares, one of which is of uncertain provenance and the other a direct pull from a Scout. Given that Carter made a million modifications to the Thermoquad over its lifespan, I thought I’d put the spare side by side with my working carb to see what visual differences I could pick out.
Apart from the extra arm attached to the main throttle linkage, they look identical to me. I did a brief comparison to my third spare, and that one isn’t even in the same family. The main body is cast differently, and there are a handful of inlets and outlets that don’t match up to the ones I’ve got, or are completely missing.
From what it looks like, most carb rebuild kits are ~$50. Peer Pressure has been getting harder to start reliably, so some carb adjustment is definitely moving up the priority list, and having a pair to tear down will help in familiarizing myself with these complicated beasts.