25.4cc 2 Cycle engine, Carburetor has a diaphragm with purge pump, ignition system is solid state, and the fuel capacity is 1.39 pints. The Redmax BT250 only weights 11.1 lbs, and its driveshaft is a curved flex, with square ends, and heads is a 4" commercial tap. The warranty is 90 days commercial, and 2 years for consumer use.