partszen Gearbox Replacement for Husqvarna 125/128 Series Trimmers — Direct-Fit Lower Shaft Gearbox, OEM-Style Mounting

partszen gearbox replacement kit restores reliable drive performance for compatible Husqvarna and Jonsered walk-behind trimmers and brushcutters.

If your machine's lower gearbox is worn, noisy, or no longer rotating the cutting head smoothly, this aftermarket partszen kit offers a direct-fit replacement for a range of Husqvarna and Jonsered models. The kit is engineered to match the OEM mounting points and gear interface so you can get back to steady cutting without sourcing the original branded part number.

Which machines will this gearbox fit?

This gearbox is made to fit multiple Husqvarna and Jonsered trimmer and brushcutter models, covering both older and current lower-shaft configurations. It replaces specific OEM part numbers and aligns with the listed model housings and shaft layouts.

• Husqvarna compatibility: 125 L, 125 LD, 125 LDX, 125 R, 125 RJ, 128 L, 128 LD, 128 LDX, 128 R, 128 RJ, 128 DJX
• Jonsered compatibility: BC2126, BC2128, GC2126C, CG2126, GC2128, GC2128C
• Cross-reference: replaces RedMax part number 530096295 for BC280

How easy is it to install the partszen gearbox?

Installation is straightforward for anyone familiar with small-engine maintenance and basic hand tools. The gearbox aligns with factory bolt locations and the drive shaft, minimizing fitment adjustments and simplifying reassembly.

• Direct-fit design aligns with OEM mounting points
• Requires common tools: wrenches, screwdrivers, and possibly a torque wrench
• Follow original disassembly order to retain seals and bearings

What does the kit include and what should I check before buying?

The package arrives as pictured and contains the gearbox assembly intended to replace the specified part numbers. Before purchasing, confirm your machine model and shaft style match the listed fitment to ensure compatibility.

• Package contains the replacement gearbox assembly as shown in product photos
• Check your machine model and existing part number against the fitment list
• Contact partszen support if you need help confirming fit or have fitment questions

Will this gearbox restore original performance and durability?

This aftermarket gearbox is manufactured to perform like the original by matching key dimensions and mounting points; however, longevity depends on installation, lubrication, and operating conditions. Use correct lubrication and avoid prolonged overload to get consistent service life from the unit.

• Engineered to match OEM mounting and gear engagement
• Proper installation and lubrication important for long life
• Suitable for routine trimming and brushcutting workloads when installed correctly

Who is this for? The partszen gearbox replacement kit is aimed at homeowners, landscapers, and small-equipment repair shops who need an economical, reliable replacement for worn or damaged lower drive gearboxes on selected Husqvarna and Jonsered walk-behind trimmers and brushcutters. If you maintain your own outdoor tools and want a direct-fit spare or repair part, this kit helps return a cutting machine to working order without waiting for a dealer-only OEM part.

• Features: Replaces part number: 530096295 for RedMax: BC280
• Fitment: Husqvarna 125/128 series and Jonsered BC/GC models as listed
• Support: partszen offers customer help if problems arise with fitment or function
• Package Includes: The item ships as pictured in product images