Stihl 039 3/8” 7 Tooth Clutch Sprocket Drum: 1125 640 2004, 11256402004

Stihl 039 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

Keep your Stihl 039 chainsaw performing reliably with this 3/8″ pitch, 7-tooth clutch sprocket drum. Designed as a replacement for part number 1125 640 2004 (11256402004), this component plays an important role in transferring power from the clutch to the saw chain.

The clutch sprocket drum is a key part of the chainsaw’s drive system. Over time, the sprocket can wear through regular use, potentially contributing to increased chain wear, poor chain engagement and reduced cutting efficiency. Replacing a worn sprocket with the correct specification helps maintain smooth chain movement and dependable cutting performance.

Key Features and Benefits

• Compatible specification: 3/8″ chain pitch with a 7-tooth sprocket.
• Reliable power transfer: Transfers drive from the clutch to the saw chain.
• Replacement part: Replaces Stihl part number 1125 640 2004 / 11256402004.
• Maintenance and repair: Suitable for replacing a worn or damaged sprocket drum.
• Helps reduce premature wear: Replacing a worn sprocket can help protect the saw chain from unnecessary wear.
• Practical replacement: Ideal for chainsaw servicing, repairs and routine maintenance.

Compatible Stihl Chainsaw Models

This sprocket drum is listed for the following models:

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

Important: Confirm the existing part number, sprocket design and 3/8″ pitch before ordering to ensure compatibility with your particular chainsaw.

Part Number Reference

• Primary part number: 1125 640 2004
• Alternative format: 11256402004
• Specification: 3/8″ pitch, 7 teeth