Description
Overview:
This Non Genuine Part is a complete 49 mm cylinder and piston kit designed for Stihl MS 390 and 039 chainsaws. It replaces worn or damaged top-end components to restore compression, power, and reliability. The cylinder features a hard chrome-plated bore for long service life, and the lightweight aluminium piston is supplied with matched rings for an effective seal. The kit also includes the gudgeon pin and circlips, plus a decompression plug suited to 039 pattern cylinders. Built to close tolerances for a dependable fit, it is suitable for routine maintenance or full top-end rebuilds on compatible 1127-series saws. Supplied under MPN 725 018, this aftermarket kit offers a practical solution for keeping your saw working efficiently.
Key Features:
- Non Genuine aftermarket replacement for cost-effective maintenance and repair
- 49 mm chrome-plated cylinder bore for wear resistance and improved durability
- Precision aluminium piston with matched rings to help restore compression and power
- Complete set: cylinder, piston, rings, gudgeon pin, circlips, and decompression plug
- Designed for Stihl 1127-series patterns used on MS 390/039 and selected related models
- Helps recover easy starting, stable idle, and cutting performance after scoring or wear
- Manufactured to close tolerances for a consistent fit with OEM layout and porting
- Suitable for workshop or DIY fitting using standard tools; refer to the service manual for torque settings and clearances
- Practical upgrade during overhauls to reduce fuel blow-by and improve efficiency
- Robust finish for reliable operation in demanding forestry, landscaping, and farm use
Typical Applications:
Used when a saw has low compression, hard starting, visible scoring, or reduced power. Ideal for routine rebuilds, winter overhauls, and repairs after seizure or ring failure. Suitable for professional arborists, landscapers, farmers, firewood processors, and DIY users maintaining Stihl saws that match the listed compatibility.
Also known as:
Top end rebuild kit, pot and piston kit, jug and piston, cylinder and piston assembly, top end kit, 49 mm bore kit, cylinder jug kit, 1127-series top end, piston and barrel set.
Fits Models:
029, 039, MS 290, MS 310, MS 390
Alternate Part Numbers:
1127 020 1213, 11270201213
Product Specifications
| L&S Part No. | 725 018 |
|---|---|
| Part Type | Non Genuine Part |
| Unit of Sale | 1 |
| Size | 49mm |
| Fits Brands | Stihl |
| Key Features | - 49 mm chrome-plated cylinder bore for durability - Includes piston, rings, gudgeon pin, circlips, decompression plug - Compatible with Stihl MS 390, 039, 1127-series - Aluminium piston with matched rings for compression - Non Genuine aftermarket part for cost-effective repair |
| Fits Models | MS290, MS310, MS390 | 029, 039 |
