Key Points Preparing your lawn mower for winter storage protects the engine and saves you costly repairs in spring. Just like the groundhogs and other woodland creatures, your lawn mower likely hibernates in winter. But before the frost and snow set in, you'll want to be sure to safely store your lawn mower and protect it from the elements. After the mowing season, your lawnmower’s fuel tank might still be partially full—so what should you do with that fuel? Before deciding which method is best suited for you and your lawn mower, consider the following pros and cons of each as laid out by our lawn care experts.