The Champion Power Equipment 46533 gasoline powered portable generator is powered by a 196cc Champion single cylinder, 4-stroke OHV engine that produces 3500 running watts and 4000 starting watts. With a 3.8 gal. fuel tank this unit can run up to 12 hours at 50% load. The OHV engine is equipped with a low oil shut-off sensor and designed for long life and easy maintenance. This unit is ideal for RV's, camping trips, hunting, traveling, jobs around the house, or home back-up power during emergencies. CARB approved for all 50 states.