Interesting information. Im thinking of putting twin Hitachi carbs on it to improve it as this carb is just not running the engine correctly.
the original carb was completely shot with flat spots all over the place. the shaft was worn out and the main body hole for it was not round any more. So the only carb that I could get (New) was a 306 for an A14 engine. Yes it works but not very well.
So that is why I was wondering if the gets are incorrect fort an A15 engine.