Starting springs for chainsaws 136 136S 137 140 140 140S 141S 147 152 MT350 350S 3500 3500S 3700 4000 4100S 5200 EFCO Code: 50050073R Original part no.: COMPATIBLE ALSO WITH OLEOMAC 936 940C 940 947 952 937 941 GS35 35C 350 350 350C 370 410 520 940 AT