ORIGINAL: happypappy
........the Magnum carb is alot harder to get corrrect mixture with and a single click will put you there and another will put the engine wayyy lean. May go back to the ST carb.
Is that the carb off a 108 engine? If it's that large of a carburator, you might want to consider a Perry oscillating pump. The carb might be too big for the engine to draw the fuel through, so a pump would help.