Description
Overview:
The Piston Ring 33 x 1.2 mm is a genuine Stihl OEM part designed to restore and maintain cylinder compression in small two-stroke engines. Made from hardened spring steel with a close-tolerance finish, it provides a reliable gas seal between the piston and cylinder wall, supporting clean combustion and consistent power. It is intended for Stihl handheld equipment, including hedgecutters and trimmers, and is a direct-fit replacement for machines that use a 33 mm bore with a 1.2 mm ring groove. Ideal for routine servicing or a top-end refresh on popular models such as the HS46 and HS56C, this ring helps improve starting, throttle response and fuel efficiency while reducing smoke and loss of power. Genuine status ensures correct fit and service life.
Key Features:
- Genuine Stihl part for assured fit and compatibility
- 33 mm diameter x 1.2 mm thickness to match the correct piston groove
- Hardened steel construction to resist wear, heat and scuffing
- Helps restore compression, power and fuel economy
- Supports easier starting and smoother idle
- Consistent sealing for reduced blow-by and exhaust smoke
- Precision-ground edges for stable ring motion in the groove
- Suitable for routine maintenance and top-end rebuilds
- Compatible with a wide range of Stihl hedgecutters, long‐reach hedge trimmers and trimmers/brushcutters
Typical Applications:
Used during engine maintenance or rebuilds when compression has dropped due to ring wear, scoring or glazing. Suitable for restoring performance on Stihl hedgecutters and long‐reach hedge trimmers used for garden maintenance, landscaping and grounds care, as well as on compatible trimmers/brushcutters in regular commercial or domestic use. Ideal when engines are hard to start, lack power under load, or show increased fuel use or exhaust smoke.
Also known as:
Often referred to as a compression ring, cylinder ring, engine ring or piston sealing ring. Some users may call it a top ring or primary ring in a two‐stroke top end. These terms describe the same component that maintains the gas seal between piston and cylinder to support efficient engine operation.
Fits Models:
FS 23 C-E, FS 23 RC-E, FS 23 SC-E, FS 24 C-E, FS 24 RC-E, FS 24 SC-E, FS23C-E, FS23CE, FS23RC-E, FS23RCE, FS23SC-E, FS23SCE, FS24C-E, FS24CE, FS24RC-E, FS24RCE, FS24SC-E, FS24SCE, HL 92 C-E, HL 92 KC-E, HL92C, HL92C-E, HL92CE, HL92KC, HL92KC-E, HL92KCE, HS 46, HS 46 C, HS 46 C-E, HS 46 C-E Z, HS 46-Z, HS 56 C-E, HS 56 C-E Z, HS 56-Z, HS46, HS46 C, HS46-Z, HS46C, HS46C-E, HS46C-EZ, HS46CE, HS46CEZ, HS46Z, HS56-Z, HS56C-E, HS56C-EZ, HS56CE, HS56CEZ, HS56Z, SP 92 C-E, SP 92 TC-E, SP92C-E, SP92CE, SP92TC-E, SP92TCE
Alternate Part Numbers:
4242-034-3000, 42420343000
Product Specifications
| L&S Part No. | 4242 034 3000 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42420343000 |
| Unit of Sale | 1 |
| Machine Type | Hedgetrimmers, Brushcutters |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part ensures correct fit and compatibility - 33 mm diameter x 1.2 mm thickness for precise piston groove fit - Hardened steel construction resists wear and heat - Restores compression, power, and fuel economy - Compatible with Stihl hedgecutters and trimmers |
| Fits Models | HS 46, HS46 C | HL92C, HL92KC |
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