Definition of "engine trouble" []

• Problem or problems occurring with an engine or motor, especially with that of a motor car (noun)

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• "The result was a British fiasco: three seaplanes, launched forty miles offshore, developed engine trouble and came down in German territory, where their crews were captured."
• "U-9 sailed from Wilhelmshaven on August 6, but engine trouble forced her to return and kept the submarine in the dockyard for the next six weeks."
• "Throughout their 350-mile outward voyage, the nine U-boats (one had engine trouble and returned home) failed to sight even one enemy warship."