Which maintenance action directly helps prevent fuel leaks and ensure metering accuracy?

• A. Ignore hose wear and leaks.
• B. Use contaminated fuel to test.
• C. Regular fuel filter changes, using clean fuel, inspecting hoses/lines for wear, and checking for leaks.
• D. Rely on visual inspection only without pressure testing.

Answer: (C)

Maintaining both fuel cleanliness and the integrity of the fuel path is essential for preventing leaks and keeping metering accurate. Regular fuel filter changes remove dirt, varnish, and particulates that can clog metering devices or restrict flow, which helps keep the system delivering a consistent, measured amount of fuel. Using clean fuel minimizes contaminants and water that can affect sensors, injectors, and flow paths, reducing the chance of erratic metering or altered pressures that would throw off a precise fuel-air mix.

Inspecting hoses and lines for wear and leaks ensures there are no hidden paths where fuel can escape or air can be drawn in, both of which would distort metering and pressure. Verifying there are no leaks through periodic checks and, when appropriate, pressure testing, confirms the system remains sealed and operates at the correct pressures required for accurate metering.