Description
Overview:
This genuine Stihl piston ring keeps your two-stroke engine sealed and efficient by maintaining correct cylinder compression. Sized precisely at 42 mm x 1.2 mm (1.65 in x 0.047 in), it suits selected Stihl brushcutters and chainsaws, including the FR350 and FR450. Made from a durable metal alloy with a smooth running face, it resists heat, friction and wear in demanding cutting conditions. A correct, tight seal helps cold starting, throttle response and fuel economy, while reducing blow-by and oil consumption. Ideal for routine engine refreshes or to replace a worn or broken ring, it is engineered for a proper fit in compatible 42 mm-class top ends where specified by Stihl.
Key Features:
- Genuine Stihl OEM part for assured fit and performance
- 42 mm bore x 1.2 mm thickness (also shown as 1.65 in x 0.047 in) for specified applications
- Helps restore and maintain compression for reliable starting and power
- Durable metal alloy construction for long service life under high temperatures
- Precision-ground profile supports correct bedding-in and low friction
- Compatible with a wide range of Stihl brushcutters and chainsaws listed below
- Suitable for standard maintenance or top-end overhauls
- Straightforward replacement when installed with basic workshop practice
Typical Applications:
Used during routine servicing or rebuilds of compatible Stihl machines to recover lost compression, improve idle stability and maintain cutting performance. Common in garden and forestry work, landscaping, agricultural clearing, and site maintenance where brushcutters, clearing saws and chainsaws must start easily and run consistently through long shifts.
Also known as:
Engine ring, compression ring, cylinder ring, piston sealing ring. Sometimes referred to as a top ring in a two-stroke top end, or simply a 42 mm x 1.2 mm ring for Stihl engines in the listed applications.
Fits Models:
021, 023, 025, FR350, FR450, FR480, FR480C, FS400, FS450, FS480, MS230, MS230C, MS250, MS250C, SP400, SP450, SP451, SP481
Alternate Part Numbers:
1123-034-3003, 11230343003
Product Specifications
| L&S Part No. | 1123 034 3003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11230343003 |
| Unit of Sale | 1 |
| Applications | 021, 023, 025, FR350, FR450, FR480, FR480C, FS400, FS450, FS480, MS230, MS230C, MS250, MS250C, SP400, SP450, SP451, SP481 |
| Machine Type | Brushcutters, Chainsaws |
| Fits Models | MS230, MS230C | MS250, MS250C | FS400, FS450, FS480 | FR350, FR450, FR480, FR480C | 021, 023, 025 |
