Sustaining a Flower-class corvette before Trafalgar

How long would a Flower-class corvette last if sent to the pre-Trafalgar era, and what modern equipment should accompany it?

Potentially several years with fuel and maintenance; lathes and other tools for replacement parts are the preferred modern cargo.

The Flower-class corvette would bring a 4-inch gun and a 40 mm pom-pom into the pre-Trafalgar setting. Its commercial-style boiler and relatively simple machinery are judged capable of running for years if kept clean and maintained. Fuel remains a condition: the example assumes oil firing and some flexibility in the oil used. For the one-ton allowance of modern equipment, lathes and other industrial tools are preferred to another ton of 4-inch shells. Those tools would help produce the parts needed to keep the ship operating.