Description
Overview:
This Low Speed Adjustment Screw is a genuine Stihl component for the carburettor on compatible professional-grade chainsaws, including the 066 and MS650. Manufactured from durable metal with precision-cut threads, it enables fine control of the low‐speed mixture setting so the engine idles smoothly and transitions cleanly to throttle. Correct low‐speed tuning supports easier starting, crisp acceleration, stable idle and efficient fuel use. As an OEM part (reference 1122 122 6803), it is engineered to the original specification for reliable fit and function on the specified Stihl saws. Ideal for routine servicing or restoring proper tuning after a carburettor clean or rebuild, this screw helps keep your saw performing consistently in varied working conditions.
Key Features:
- Genuine Stihl OEM part for assured quality and compatibility (1122 122 6803)
- Precision threads and tip profile for accurate low‐speed mixture adjustments
- Robust metal construction designed to withstand vibration and regular use
- Correct fit on the carburettor for consistent, repeatable settings
- Helps achieve stable idle, smooth pickup and improved running efficiency
- Suitable for routine maintenance, carburettor servicing and rebuilds
- Simple to install and adjust with basic hand tools
- Supports reliable performance across temperature and workload changes
Typical Applications:
Used during routine tuning, after carburettor cleaning or replacement, or when symptoms such as rough idle, hesitation on acceleration, or poor throttle response appear. Helpful when adapting the saw to different operating conditions, such as seasonal temperature shifts or fuel variations. Also suitable for restoring factory‐spec performance on Stihl professional saws used in forestry, arborist work, construction and general property maintenance.
Also known as:
Low‐speed mixture screw, L screw, carburettor adjustment screw, idle mixture screw, throttle mixture screw, carb mix screw, tuning screw for low circuit. These terms are commonly used for the screw that controls the carburettor's low‐speed fuel mixture on two‐stroke engines.
Fits Models:
066, MS650, MS660
Alternate Part Numbers:
1122-122-6803, 11221226803
Product Specifications
| L&S Part No. | 1122 122 6803 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11221226803 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM part for 066, MS650, MS660 chainsaws - Precision threads for accurate low-speed mixture adjustments - Durable metal construction withstands vibration and regular use - Ensures stable idle and smooth throttle transitions - Suitable for carburettor servicing and routine maintenance |
| Fits Models | MS650 | MS660 | 066 |
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