My 80+cc chainsaws will run for 30 to 40 minutes of hard, steady wood cutting and use about 14 oz of fuel (guessing but it is a small amount).
Same size engine in a plane will drain a 24oz tank in about 18 minutes. Our plane engines are working much harder than the carbs are designed for. Any throttle setting above 1/2 is working the engine pretty hard and everything possible to help the engine stay cool and survive should be concidered. It would be good for me if I knew more ways to mod up a carb to treat my engines better.