Stihl MS310 3/8” 7 Tooth Clutch Sprocket Drum: 1125 640 2004, 11256402004

Stihl MS310 3/8” 7 Tooth Clutch Sprocket Drum

Replaces: 1125 640 2004 , 11256402004 , oregon 38145x , gb st316-a7n

Fits Models: 036, 029, 039, MS290, MS310, MS390, 034 , Stihl 036, Stihl 029, Stihl 039, Stihl MS290, Stihl MS310, Stihl MS390, Stihl 034

Replace a worn or damaged chainsaw sprocket with this 3/8″ pitch, 7-tooth clutch sprocket drum, suitable for the Stihl MS310 and several other compatible chainsaw models. It replaces part numbers 1125 640 2004 and 11256402004.

The sprocket drum transfers power from the clutch to the saw chain, making it a critical component of the chainsaw’s drive system. A worn sprocket can lead to poor chain engagement, uneven chain movement and increased wear on the chain and guide bar. Replacing the sprocket as part of routine chainsaw maintenance can help maintain smooth and reliable cutting performance.

Key Features

• 3/8″ chain pitch
• 7-tooth sprocket
• Clutch sprocket drum design
• Replacement for 1125 640 2004 / 11256402004
• Suitable for the Stihl MS310
• Also suitable for several other compatible Stihl chainsaws
• Ideal for replacing a worn or damaged sprocket
• Helps provide smooth and consistent chain engagement
• Suitable for professional and domestic chainsaw maintenance

Compatible Models

This 3/8″ 7-tooth sprocket is listed for:

• Stihl 029
• Stihl 034
• Stihl 036
• Stihl 039
• Stihl MS290
• Stihl MS310
• Stihl MS390

Some suppliers also list additional compatible models, so the 3/8″ pitch, 7-tooth configuration and part number should be checked against the existing sprocket before ordering.

Replacement Part Numbers

• 1125 640 2004
• 11256402004
• 1125 640 2000
• 11256402000
• Oregon 38145X
• GB ST316-A7N