Carburettor

Carburettor with built-in filter compensation

The carburettor has a built-in filter compensation mechanism that ensures the machine gets the right fuel/air mixture almost regardless of how badly the filters are clogged. The results of this design are: • consistently high engine output • better filter economy, long service intervals • lower fuel consumption • less air pollution

Thermally insulated, vibration-damped carburettor

Every engine produces some vibration. The carburettor contains a number of moving parts, such as the inlet needle with its control lever and diaphragm, and the choke and throttle shafts. Their operation is affected by vibration, and the greater the mass (weight) of the parts, the greater the effect. (Lightweight parts can accommodate fluctuating vibration more easily than heavy parts). The moving parts of the carburettor are larger in large machines, and the 371K and 3120K Air Injection therefore have a vibration-damping element between the cylinder and carburettor. The element between the cylinder and carburettor also acts as a thermal insulator and prevents vapour locks forming in the carburettor.