Description
Overview:
This Genuine Stihl piston ring (42 x 1.5 mm) is an OEM replacement for 42 mm bore two‐stroke chainsaw engines, built to restore and maintain compression and sealing in the cylinder. Designed specifically for Stihl 024 and MS 240 models, it fits a 1.5 mm piston groove and works to reduce blow‐by, support efficient combustion, and keep starting and power delivery consistent. Made to Stihl factory tolerances, it provides the correct ring tension and end gap for reliable operation and long service life. Ideal for routine top‐end maintenance or a full rebuild after wear or scoring, it helps keep your saw running smoothly in demanding professional use or regular domestic cutting. Manufacturer Part Number: 1121 034 3005.
Key Features:
- Genuine Stihl OEM part for assured compatibility and quality (MPN: 1121 034 3005).
- Precision size 42 mm x 1.5 mm to suit 42 mm bore pistons used in Stihl 024/MS 240.
- Restores cylinder compression and power; reduces blow‐by and hard starting.
- Engineered to Stihl tolerances for correct ring tension and reliable sealing.
- Durable construction for extended service in two‐stroke chainsaw applications.
- Fits without modification; straightforward to install with standard workshop practice.
- Supports fuel efficiency, throttle response, and cleaner running.
- Suitable for professional users and DIY maintenance of compatible Stihl saws.
Typical Applications:
Used during top‐end refreshes and full engine rebuilds on compatible Stihl chainsaws to recover lost compression, improve starting and idle stability, and maintain cutting performance. Ideal when replacing a worn piston, after cylinder honing, or as preventative maintenance to keep equipment reliable for forestry, arborist, landscaping, and domestic firewood tasks.
Also known as:
Compression ring, piston sealing ring, top compression ring, cylinder compression ring, engine ring. These terms refer to the same component that seals the gap between piston and cylinder to maintain pressure in a two‐stroke engine.
Fits Models:
024
MS 240
MS240
Alternate Part Numbers:
1121-034-3005, 11210343005
Product Specifications
| L&S Part No. | 1121 034 3005 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11210343005 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM part for 42 mm bore chainsaw engines - Fits Stihl 024 and MS 240 models precisely - 42 x 1.5 mm size for correct piston groove fit - Restores compression, reducing blow-by and hard starting - Durable for professional and domestic two-stroke use |
| Fits Models | MS240 | 024 |
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