Gear Head Pole Saw Gearbox Replacement For HT73 HT75 HT100 HT101 HT130 HT131 HT250 KM90 KM110 KM130 FS85 Pruner Pole Cutter 3 8 Inch 6 Tooth Sprocket Replaces 4182 200 0070 4138 205 0008

Gear Head Gearbox for Stihl Pole Saws 3/8 Inch 6-Tooth
✔️ 3/8 inch pitch (9.525 mm), 6 tooth, 25.4 mm (1 in) pipe, square 5.2 mm (0.205 in) shaft, single unit

This gear head gearbox is a direct replacement for the worn or damaged unit on compatible pole saws and pruners. It’s designed to drop into HT-series and KM-series handles where a round tube shaft and 3/8 inch pitch gear are standard, making field repairs quick and cost-effective.

✅ Replaces OEM numbers 4182 200 0070 and 4138 205 0008
✅ Compatible with HT73 HT75 HT100 HT101 HT130 HT131 HT250 KM90 KM110 KM130 FS85; HT133 if round tube
✅ 3/8 inch pitch, 6 tooth sprocket
✅ 25.4 mm diameter pipe with a square 5.2 mm inner shaft (1 in / 0.205 in)
✅ Includes 1x Gear Head Gearbox, 1x Chainsaw T-Wrench, 1x T27 screwdriver
✅ Ready for direct installation; factory-tested and calibrated

💡 What is a gear head gearbox used for in pole saws and similar tools? It helps transfer power efficiently from the drive to the cutting head, boosting performance and durability. - gear box replacement for pole saws keeps torque steady under load - standard 3/8 inch pitch and 6-tooth sprocket compatibility simplifies swaps - direct-install design lowers downtime and upkeep