Ans: Yes, of course, you have to drain fuel from your mower before its storage. The reason is that fuel gets stale after a couple of months, especially while not mowing the lawn during the cold/winter season. At that time, you have to drain out the fuel tank and bleed the carb. If you forget to clear the old/remaining fuel from the machine, it will separate and cause blockage in the carbs. It will make an issue when you restart the machine for mowing.