Description
Overview:
The High Speed Adjustment Screw is a Genuine Stihl part for setting the high‐speed mixture on carburettors used in a wide range of Stihl handheld machines. Built from durable, fuel‐resistant materials, it provides precise control of maximum engine speed to keep performance, throttle response and cutting power consistent under load. It is designed for Stihl 4144‐series machines, including popular brushcutters such as the FS56 and FS70C, and selected edgers, hedge trimmers, pole pruners, Kombi engines and MultiSystem units. Using the correct OEM screw helps maintain reliability and reduces the risk of poor running caused by worn or incorrect adjusters. OEM No. 4144 122 6700 confirms exact fit and compatibility across the specified models. Genuine Stihl part.
Key Features:
- Genuine Stihl OEM component for assured fit and function
- Precise high‐speed mixture adjustment to set correct maximum rpm
- Fuel‐resistant, durable construction for long service life
- Helps restore top‐end power and smooth operation under load
- Stable settings that resist vibration and movement during use
- Essential during carburettor service, rebuilds or troubleshooting
- Supports efficient running and helps protect the engine from lean or rich conditions
- Direct replacement for worn, damaged or missing adjustment screws
- Suitable for multiple Stihl 4144‐series machines to simplify spares stocking
- OEM No. 4144 122 6700 for easy identification
Typical Applications:
Used during routine servicing or repairs to set the high‐speed mixture on Stihl carburettors after cleaning, diaphragm replacement or a full rebuild. Ideal for correcting poor acceleration, loss of top‐end power or inconsistent cutting performance on brushcutters, edgers, hedge trimmers, pole pruners and Kombi engines. Also useful when replacing a lost or damaged screw to restore proper adjustment range.
Also known as:
H screw, high‐speed mixture screw, carburettor mixture screw (high), speed adjuster, tuning screw, adjustment bolt.
Fits Models:
FC 56, FC 70, FC 70 C, FC56, FC56 C-E Z, FC56C-EZ, FC56CEZ, FC70, FC70 C-E Z, FC70-Z, FC70C, FC70C-EZ, FC70CEZ, FC70Z, FS40, FS40 C-E, FS40-Z, FS40C-E, FS40CE, FS40Z, FS50, FS50 C-E, FS50 C-E L, FS50 C-E LZ, FS50-L, FS50-LZ, FS50C-E, FS50C-EL, FS50C-ELZ, FS50CE, FS50CEL, FS50L, FS50LZ, FS56, FS56 C-E, FS56 C-E Z, FS56 R, FS56 RC-E, FS56 RC-E Z, FS56C, FS56C-E, FS56C-EZ, FS56CE, FS56CEZ, FS56R, FS56RC-E, FS56RC-EZ, FS56RCE, FS70 C-E, FS70 R-Z, FS70 RC-E, FS70 RC-E Z, FS70C, FS70C-E, FS70CE, FS70R, FS70R-Z, FS70RC, FS70RC-E, FS70RC-EZ, FS70RCE, FS70RZ, HL56 K-Z, HL56K, HL56K-Z, HL56KZ, HT56 C, HT56 C-E, HT56 C-E Z, HT56C, HT56C-E, HT56C-EZ, HT56CE, HT56CEZ, KM56 RC-E, KM56 RC-E Z, KM56C, KM56RC, KM56RC-E, KM56RC-EZ, KM56RCE, MM 56 MultiSystem, MM56, MM56 C-E Z, MM56-Z, MM56C-EZ, MM56CEZ, MM56MultiSystem, MM56Z
Alternate Part Numbers:
4144-122-6700, 41441226700
Product Specifications
| L&S Part No. | 4144 122 6700 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41441226700 |
| Unit of Sale | 1 |
| Machine Type | Brushcutters, Pole Pruners, Multi Tools |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM component ensures correct fit and function - Precise high-speed mixture adjustment for optimal engine performance - Fuel-resistant materials enhance durability and longevity - Compatible with Stihl 4144-series machines, including FS56 and FS70C - OEM No. 4144 122 6700 for easy identification and compatibility |
| Fits Models | FS40, FS50 | FS56, FS56C, FS56R | FS70C, FS70R, FS70RC | HT56 C | KM56C, KM56RC | MM 56 MultiSystem | FC 56 | FC 70, FC 70 C | HL56K |
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