I don't know why so many worship them like Baal. Fiddly little things where you need a degree in rocketry to rebuild them. Sometimes there is something to be said for plastics and Norm had shown us the way.
Any home handyman can dismantle them and put them back together. Ok the throttle cable may stump some but simple observation will guide you eventually.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!