Swisher Shindaiwa E4 24.5cc 4-Stroke Engine Commercial Grade Blower E4-A3000 24.5cc E4 Hybrid Engine produces 1.15 HP and gives the power and torque of a 4-stroke engine while having the light weight and all position operation of a 2-stroke. Fuels like a 2-stroke, using a 50:1 mix, but remains up to 25% more fuel efficient than similar displacement 2-stroke engines. 20 fl oz fuel tank. Patented Power Boost Chamber supercharges the engine to give it even more power and torque. 2 ring piston and cylinder is chrome plated for durability and longevity. Handle mounted start/run/stop, cruise control, hush button, and throttle controls put all functions at your fingertips Non-CARB Compliant/Not For Sale In California