Stens 155-515 Starter Spring Replaces: GB: GB34008 Lawn-Boy: 610302, 613102 MCCULLOCH: 83078 Ryobi: 610302, 613102, 791-613102 Stihl: 4130 195 1600 Fits models: Ryobi: engines under 31cc Stihl: FS36, FS40 and FS44 Material: Black spring Steel