What is the purpose of having a flexible hose section connecting rigid metallic fuel lines to the engine?

Having a flexible hose section connecting rigid metallic fuel lines to the engine serves the primary purpose of accommodating movement and vibration. In a marine environment, engines generate significant vibration and can move slightly due to various operational factors, including engine torque and shifting loads. Rigid metallic lines, while durable and secure, cannot flex or bend without risking damage or failure.

The flexible hose allows for some degree of motion between the engine and the fuel supply lines, helping to prevent stress and fatigue that could lead to leaks or breaks in the system. This design is essential for maintaining the integrity and safety of the fuel system. Comfort accommodates not only the normal operational vibrations but also any movement caused by the boat's operation in water or during adverse conditions.

While reducing production costs, enhancing fuel flow, and simplifying installation might be secondary benefits, the critical safety aspect of accommodating movement and vibration is the most important function of integrating flexible hoses in this context.