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Description
4230 642 6501 STIHL Connecting Rod – Genuine OEM Blade Drive Gear Part
The STIHL Connecting Rod (4230 642 6501) is a genuine OEM internal gearbox component designed to transfer motion within the blade drive gear assemblies of select STIHL hedge trimmers and KombiSystem attachments. This connecting rod plays a critical role in converting gear rotation into the reciprocating blade movement required for smooth and efficient cutting performance.
Over time, connecting rods may wear due to continuous load, vibration, insufficient lubrication, or extended professional use. A worn or damaged connecting rod can result in reduced cutting efficiency, excessive gearbox noise, blade binding, or uneven blade movement. Replacing it with the correct OEM part helps restore proper blade drive operation without replacing the entire gearbox assembly.
Manufactured to STIHL factory specifications, this genuine connecting rod ensures correct fitment, durability, and long-term reliability under demanding cutting conditions.
Product Details
OEM Part Number: 4230 642 6501
Brand: STIHL (Genuine OEM)
Part Type: Connecting Rod
Application: Blade drive gear / gearbox motion transfer system
Condition: New Genuine OEM Part
Function
This STIHL connecting rod is designed to:
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Transfer motion from the gear drive to the cutter blades
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Support smooth reciprocating blade movement
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Maintain proper alignment inside the blade drive gearbox
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Replace worn or damaged internal drive components
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Restore reliable cutting performance and gearbox operation
⚠️ A failing connecting rod can cause blade binding, excessive noise, or reduced cutting efficiency.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4230 642 6501
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Your unit model matches those listed below
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Application matches your STIHL illustrated parts diagram
⚠️ Gearbox connecting components are model-specific — always verify by OEM part number and drive assembly type.
Compatibility
This OEM connecting rod fits many STIHL hedge trimmers and KombiSystem attachments equipped with specific blade drive gear and gearbox housing configurations, including:
Hedge Trimmers / Kombi Attachments
HL 45 / HL 45-D (Blade drive gear – 24.2005)
HL 73 / HL 73 K (Blade drive gear)
HL 75 / HL 75 K (Blade drive gear 0°, 30°, 0°–90° – 24.2005)
HL 100 / HL 100 K (Blade drive gear 0°, 30°, 0°–90° – 24.2005)
HL 0° / HL 0° 90° (Blade drive gear 0°, 30°, 0°–90°)
HL-KM (Blade drive gear 0°, 30°, 0°–90° – 24.2005)
HL-KM 0° / HL-KM 30° / HL-KM 0° 90°
FH 0° 90° (Blade drive gear 0°–90°)
FH-KM 0° 90° (Blade drive gear 0°–90°)
Hedge Trimmer Gear Housing Models
HS 74 (Gear housing, Cutter bar 420mm / 17")
HS 75 (Gear housing)
HS 80 (Gear housing)
HS 85 (Gear housing)
HS 242 (Gearbox housing, Blade)
(Exact fitment depends on production version — always verify using OEM parts diagram.)
Installation Notes
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Remove cutter bar and access blade drive gearbox
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Disassemble gearbox carefully on a clean surface
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Replace connecting rod in correct orientation
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Inspect gears, bearings, and lubrication condition
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Reassemble gearbox and torque fasteners to specification
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Verify smooth blade movement after installation
⚠️ Gearbox service should be performed by a qualified technician to ensure correct alignment and lubrication.
Maintenance Tips
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Maintain proper gearbox lubrication at recommended intervals
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Inspect blade drive system for noise, play, or uneven movement
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Replace worn internal drive components during gearbox rebuilds
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Avoid forcing blades if binding occurs
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Always use genuine STIHL OEM gearbox parts for correct fit and durability
