Remove 1/2 cup of the boiling water and set aside to cool to lukewarm.
Combine remaining boiling water, 2 cups sugar, ginger, honey, and lime juice in a large plastic container.
Mix the 1/2 cup lukewarm water, 1 cup sugar, and yeast together in a separate bowl.
Let stand until the yeast softens and begins to form a creamy paste, about 5 minutes; stir into ginger mixture.
Cover container and let sit for 3 days. Skim foam from top, strain liquid, and pour ginger beer into clean storage containers; chill.
4 quarts boiling water
3 cups white sugar, divided
½ pound ginger root with skin, grated
½ cup honey
½ cup lime juice
1 cup fresh brewers’ yeast