ABYC Diesel Practice Exam

Which factor is NOT part of initial checks when a customer reports fuel consumption issues?

1. Compression test results

2. Boat history

3. Condition of the fuel lines

4. No load RPM measurements

The correct answer is: Compression test results

When assessing fuel consumption issues reported by a customer, the initial checks should focus on factors that directly affect the engine's performance and fuel efficiency. While compression test results are valuable for overall engine diagnostics, they are typically not part of the first steps taken when troubleshooting fuel consumption problems. The other options play a crucial role in understanding and identifying potential causes of fuel inefficiency. The boat's history can provide insights into previous performance issues or maintenance records, which may indicate underlying problems. The condition of the fuel lines is essential, as any leaks, blockages, or deterioration can directly impact fuel flow and consumption. Finally, measuring no load RPM is vital because it allows the technician to assess the engine's performance in an unloaded state, which provides baseline data for fuel consumption under normal operating conditions. In summary, while compression tests are essential for a comprehensive evaluation of engine health, they do not form part of the initial checks specifically aimed at diagnosing fuel consumption issues, making this the correct choice.