A diesel engine operates erratically, over speeds, and fails to restart when cranked at normal speed. Which of the following problems is the most likely cause for the engine failing to restart?
Official USCG Answer & Rule Citation
Correct Answer: Option C — Failure to reset the over speed trip
An overspeed trip mechanically shuts off fuel delivery when engine revolutions exceed safe design limits. If the mechanical trip linkage or reset latch is not manually reset following a shutdown event, the fuel rack remains blocked, preventing the engine from restarting.
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