In 1803, after the recommencement of hostilities with France, "Guachapin" participated in the captures of Tobago and St. Lucia. In September 1803, "Guachupin" [sic] captured three prizes. On 2 September she was in company with when they captured two vessels whose names they did not record:  Then on 24 September "Guachapin" captured the Spanish ship "Industria", which was carrying 220 slaves (French property). On 25 January 1804, "Saint Lucia" captured the French privateers "Furet" and "Bijou". "Bijou", had captured two prizes, one of which was the brig "Good Intent", which had been sailing from Barbados to Demarara, and which "Guachapin" had already retaken. A few months later, "Guachapin" assisted Commodore Sir Samuel Hood's squadron at the capture of Surinam River in 1804. The squadron consisted of Hood's flagship, the 74-gun third rate , , , , , "Drake", the 10-gun schooner , and transports carrying 2000 troops under Brigadier-General Sir Charles Green. On 24 April, "Hippomenes", under Commander Conway Shipley, escorted a convoy carrying a division of the army under Brigadier-General Frederick Maitland to land at Warappa creek to collect enough boats from the plantations to transport troops to the rear of Fort New Amsterdam. On 30 April, Mackenzie, unable to sail closer, left "Guachapin" 50 leagues to leeward and brought up all her boats, together with 50 crewmen. He then assisted Shipley in superintending the landing of Maitland's troops at Warappa. The Dutch governor initially rejected the surrender terms but surrendered on 5 May after the British captured the battery of Friderici. The officers and men from "Guachapin" who had served ashore during the capture of Suriname were among those that shared in the prize money from the campaign. In June 1804 Commander Robert Henderson replaced Mackenzie, who had transferred to take command of the newly-captured in May, and then in June. Then on 13 September 1806, "Guachapin" became a guardship at St. Johns, Antigua. In 1807 she was under Acting Lieutenant Uriah Goodwin. In 1810, William Fletcher was promoted to lieutenant to command her. At some point Lieutenant Michael Jenkins took command.