Carburetor For Echo CS-310 Chainsaw - Echo Chainsaw NC04612001001 - C04612999999 Mowers Fitment: For Walbro WT-946 Carb For Echo CS-310 Chainsaw Replaces Part # A021001700. Fits The Following Echo CS-310 Chainsaw Models, For Echo CS-310 - Echo Chainsaw (SN: C04511001001 - C04511999999) Carburetor For Echo CS-310 - Echo Chainsaw (SN: C04612001001 - C04612999999) Carburetor For Echo CS-310 - Echo Chainsaw (SN: C04713001001 - C04713999999) Carburetor For Echo CS-310 - Echo Chainsaw (SN: C23926001001 - C23926999999) Carburetor For Echo CS-310 - Echo Chainsaw (SN: C32914001001 - C32914999999) Carburetor Package includes: 1 x carburetor 2 x gaskets 1 x primer bulb 1 x spark plug 2 x fuel lines 2 x grommets