Fuel line

Rubber hoses are flexible and can be cut to length as required, but they have a tendency to perish over time and can rub through if not properly secured.

[2] More modern vehicles may be fitted with fuel lines made of plastic, typically nylon.

Plastic fuel lines do not perish and are lighter than metal tubing, but they melt at lower temperatures and cannot be repaired as easily.

Steel pipes are cheap and strong, but can corrode causing fuel leaks.

[4] When one primes the carburetor, fuel is pushed from the carb bowl to the barrel using the rubber primer bulb.