550 Snow Series OHV Engine. Briggs & Stratton Snow Series Engines are specially designed for harsh snow conditions. Qualified to start even at temperatures down to -20 degree F. Enclosed heat management system surrounds the carburetor with warm, dry air to prevent icing. Freeze resistant recoil starter ensures dependable starts. Oversize controls for easy operation with gloves or mittens. Electric start optional for easy starting in the cold. Ready access high oil fill. Large capacity fuel tank for long runtime between refueling. Aluminized or coated muffler produces quieter operation while resisting corrosive effects of salt and moisture.