Echo:

• CS-600P 59.8cc Chainsaw
• CS-590 (C25812001001 - C25812999999) 59.8cc Timber Wolf Chain Saw
• CS-590 (C25913001001 - C25913999999) 59.8cc Timber Wolf Chain Saw
• CS-600P (C03603001001 - C03603999999) 59.8cc Professional Cutting System Chain Saw
• CS-600P (C03704001001 - C03704999999) 59.8cc Professional Cutting System Chain Saw
• CS-600P (C22312001001 - C22312999999) 59.8cc Professional Cutting System Chain Saw
• CS-600P (C22413001001 - C22413999999) 59.8cc Professional Cutting System Chain Saw
• CS-590 (37000001-37999999) Chainsaw Lawn Equipment
• CS-590 (C69015001001-C69015999999) Chainsaw Lawn Equipment

Shindaiwa:

• 591 (C36112001001-C36112999999) Gasoline Chainsaws
• 591 (C36213001001-C36213999999) Gasoline Chainsaws
• 591 (C69115001001-C69115999999) Gasoline Chainsaws

This part replaces obsolete part #: A021001661 and A021001660.