21 inch lawn boy 2 cycle . Mix 2 cycle oil to gas at 40 to 1 ratio. Never ever oil change's. These 2 cycle are not made anymore. Has electric start as well with rope. Has fairly new battery with charger. Self propelled It has three speed's .Gold series walk behind. I just serviced carburetor ,needle and seat float,sharpened blade new primer bulb, cleaned sponge filter and applied light oil. Has rear bagger. Runs great. This was from my in law estate. I had used this mower at another residence and it mowed great ,but not mowing there anymore .