Typical fixed-jet carburettor- paul-ryan.info Choke disc; thethrottle disc orbutterfly islower down. Choke linkage Throttle-stop screwrestricting the travelof the lever. Throttle lever, connectedto a throttle rod. Volume-control screw:this one regulates fuelflow. Fuel pipe The acceleratorpump delivers alitle extra fuel foracceleration.

The jets in this type of carburettor are not adjustable, so the air-fuel mixture is adjusted by directly regulating the flow of fuel or air into them.

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Adjusting a fixed-jet carburettor

A fixed-jet carburettor mixes air and fuel by means of several jets. The jets are small holes whi...