That sounds like a governor vane stationary, as the engine speeds up, the wind from the fan pushes that flap, and it closes the throttle a bit. This helps prevent over revving in no load situations.
The when load is applied, the engine slows, and the air on the flap is less, so the spring pulls it back, and the throttle opens more, to rev the engine, and cope with the load.
At least that's what the flappy doodah is on that Victa G32 carburetor!
Last edited by Mr Davis; 27/08/11 02:26 PM. Reason: G2 not G3 (but G3 has one too!)
