Description
Overview:
This Genuine Stihl gasket (part no. 1123 129 0900) is a replacement sealing component for mid-size Stihl petrol chainsaws. It is designed to sit between mating engine surfaces to create an airtight and fuel-tight seal, helping to maintain compression and prevent oil, exhaust, and intake leaks. Made from durable, heat- and fuel-resistant gasket material, it withstands the thermal and chemical conditions found in chainsaw engines. Built to the original specification for a precise fit, it supports reliable operation and consistent tuning. Ideal for routine maintenance or repair work on models such as the MS210 and MS230, it restores proper sealing integrity and helps protect the engine from lean running caused by unmetered air.
Key Features:
- Genuine Stihl OEM part for assured compatibility and quality (1123 129 0900)
- Precision cut to the original profile for accurate alignment of ports and bolt holes
- Heat, fuel, and oil resistant material for dependable long-term sealing
- Helps maintain compression, stable idle, and overall engine efficiency
- Supports reliable starting and consistent performance under load
- Clean edges and consistent thickness for easy seating and quick fitting
- Suitable for professional servicing and DIY maintenance tasks
- Direct replacement with no modifications required
Typical Applications:
Used during maintenance and repairs where a seal between engine components must be restored, such as after removing or refitting parts during servicing. Helps prevent air, fuel, or exhaust leaks that can affect performance, emissions, or starting. Commonly fitted during top-end refreshes, carburettor-related work, or general strip-down and reassembly of compatible Stihl chainsaws.
Also known as:
Engine gasket, sealing gasket, chainsaw gasket, paper gasket, OEM gasket, replacement seal, motor gasket, service gasket, compression seal. These terms are often used when referring to gaskets that restore airtight and fuel-tight joints between engine mating surfaces on small petrol machinery.
Fits Models:
021, 023, 025, MS 210, MS 210 C, MS 230, MS 230 C, MS 250, MS 250 C, MS210, MS210C, MS230, MS230C, MS250, MS250C
Alternate Part Numbers:
1123-129-0900, 11231290900
Product Specifications
| L&S Part No. | 1123 129 0900 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11231290900 |
| Unit of Sale | 1 |
| Applications | 021, 023, 025, MS 210, MS 210 C, MS 230, MS 230 C, MS 250, MS 250 C, MS210, MS210C, MS230, MS230C, MS250, MS250C |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS230, MS230C | MS250, MS250C | 021, 023, 025 |
