4243 640 0509 STIHL Gear Housing (0°, 500 mm) – Genuine OEM Gear Head Part w/60" High-Volume Output Deck Using a genuine STIHL worm

Using a genuine STIHL worm gear ensures proper oil delivery

Replace the filter if damaged or excessively worn

The STIHL Drive Tube Assembly (4182 710 7177) is a genuine OEM replacement drive tube designed for use in select STIHL pole pruners and professional high-reach pruning systems

Apply bar and chain oil as recommended

Always order and install the updated replacement module for proper compatibility and performance

4243 640 0509 STIHL Gear Housing (0°, 500 mm) – Genuine OEM Gear Head Part w/60" High-Volume Output Deck Using a genuine STIHL worm4243 640 0509 STIHL Gear Housing (0, 500 mm) Genuine OEM Gear Head Part The STIHL Gear Housing (0, 500 mm) (4243 640 0509) is a genuine OEM gearbox casing component designed for select STIHL long reach hedge trimmers and KombiSystem hedge trimmer attachments. This gear housing forms the protective outer body of the 0 gear head assembly, supporting internal gears, bearings, and lubrication required for smooth blade drive operation. Over time, gear