Key Points Taking time to winterize your lawn mower protects your investment, saves money on repairs, and ensures easy spring start-ups. Key steps include cleaning the mower, removing or stabilizing fuel, changing oil, and protecting metal parts from rust. Proper storage—indoors when possible, or outside with a waterproof cover—keeps your mower safe from dampness, chemicals, and corrosion. You’ve cut the grass for the last time and now it’s time to put away the lawn mower until spring. “If you skip winter prep entirely, your mower’s likely to suffer,” says Skye Durrant, founder of LawnGuru, a platform that connects homeowners with top-tier landscaping pros.