×
Description
4138 351 1000 STIHL Gasket – Genuine OEM Part
The STIHL Gasket (4138 351 1000) is a genuine OEM sealing component designed for use in the gear head and related assemblies of select STIHL HT-series pole pruners and HT-KM pole pruner attachments. This gasket helps maintain a proper seal between mating surfaces, supporting reliable operation and helping prevent oil leakage or performance issues.
Manufactured to STIHL’s exact factory specifications, this OEM gasket provides correct fitment, dependable sealing, and long-lasting durability when replacing worn, damaged, or flattened original gaskets.
Product Details
OEM Part Number: 4138 351 1000
Brand: STIHL (Genuine OEM)
Part Type: Gasket
Application: Gear Head / Oil Tank / Chain Sprocket Cover Assemblies
Condition: New Genuine OEM Part
Function
This gasket is designed to:
Seal mating surfaces inside the gear head or oil system area
Help prevent oil leaks and seepage
Maintain proper lubrication and component protection
Replace worn, damaged, or flattened gaskets
Restore safe and reliable pole pruner performance
⚠️ A worn gasket may cause oil leaks, reduced lubrication, or premature wear.
Verify Fitment in 30 Seconds
Before ordering, confirm the following:
OEM part number 4138 351 1000
Your STIHL model is listed below
The gasket location matches your parts diagram (gear head / cover area)
⚠️ Always verify fitment by OEM part number for best accuracy.
Compatibility
Fits select STIHL pole pruners and attachments, including:
Pole Pruners / Long-Reach Units
HT-KM Pole Pruner (Gear Head)
HT-KM (Gear Head)
HT (Gear Head)
HT 56 C-E (Oil Tank / Chain Sprocket Cover)
HT 70 (Gear Head)
HT 73 (Oil Tank / Chain Sprocket Cover)
HT 75 (Gear Head / Drive Tube Assembly)
HT 100 (Oil Tank / Chain Sprocket Cover)
HT 101 (Gear Head)
HT 130 (Gear Head)
HT 131 (Drive Tube Assembly / Gear Head)
HT 132 (Gear Head)
HT 250 (Gear Head)
⚠️ This list includes common applications — always confirm using your parts diagram or owner’s manual.
Installation / Usage
Turn off engine before servicing
Access the gear head / cover assembly area
Remove the old gasket carefully
Clean mating surfaces thoroughly
Install STIHL OEM gasket 4138 351 1000 in the correct position
Reassemble and tighten evenly
Test for proper sealing and oiling function
⚠️ Professional installation is recommended if unsure.
Maintenance Tips
Inspect gear head and oil system seals regularly
Replace worn gaskets immediately to prevent leaks
Keep the area clean from debris buildup
Use only genuine STIHL OEM sealing parts for best reliability
