In May 1797, whilst under the command of Captain Robert Fancourt, "Agamemnon" was involved in the Nore mutiny. On 29 May, the North Sea squadron lying in the Yarmouth Roads was ordered to sea. Only three ships, , "Agamemnon" and , obeyed the signal, but "Agamemnon"s crew later mutinied, and sailed the ship back to Yarmouth Roads. The ship was then taken to join the main mutiny at the Nore anchorage, along with , and , arriving on 7 June. After a blockade of London was formed by the mutineers, several ships began to desert the wider mutiny, in many cases being fired upon by the remaining ships. Order was eventually restored aboard "Agamemnon" when the loyal seamen and marines forcibly ejected the hard-line mutineers from the ship. Captain Fancourt was able to secure a pardon for the remaining ship's company.