Bartamos is doing this the right way.....asking clarifying questions.
As for myself, I’m just gonna throw some more poo at the wall and see what sticks.
I like the motor mount theory, but the fact that it starts acting up after 20 mins doesn’t jive with that.
A couple other ideas I haven’t seen mentioned:
* I know nothing about the WW carb or what kind of choke it has. Maybe some kind of choke weirdness?
* Some sort of vapor lock thing?
* Perhaps a vacuum leak at the manifold or carb base that develops only once the engine gets to temp and things move around a bit?
