Description
Overview:
The Carburettor C1Q-S265 is a genuine Stihl replacement part for two-stroke brushcutters. Built around a robust die-cast aluminium body with precision metering components and fuel‐resistant diaphragms and seals, it mixes the correct ratio of air and petrol for dependable starting, smooth idling and strong throttle response. It is engineered to fit Stihl handheld machines, including popular models such as the FS45 and FS55, and restores performance where the original unit is worn, blocked or difficult to tune. Using the correct OEM carburettor helps maintain engine health, fuel economy and compliance with the machine's service settings. OEM reference 4140 120 0631. Genuine Stihl part designed for a precise fit and consistent operation in daily use.
Key Features:
- Genuine Stihl part (C1Q-S265) - OEM 4140 120 0631
- Durable die-cast aluminium construction with quality, fuel‐resistant diaphragms and seals
- Accurate fuel/air metering for easier starting, stable idle and full power under load
- Direct-fit for the FS45/FS55 family; no modifications required
- Standard mixture and idle adjustment screws allow fine tuning to suit the engine
- Replaces units affected by blocked jets, stiff diaphragms, air leaks or wear
- Helps reduce downtime and repeated re-tuning compared with a failing carburettor
- Suitable for both professional and domestic maintenance of compatible Stihl machines
Typical Applications:
Used during service or repair to restore correct fuelling on Stihl brushcutters. Ideal when the engine is hard to start, hunts at idle, stalls when throttled, or has poor acceleration. Supports reliable trimming, edging and clearing of grass and light scrub in gardens, landscaping work and site maintenance.
Also known as:
Carburettor, carb, carburetor (US), fuel metering unit, mixing carb, carb assembly, C1Q-S265 carb for Stihl trimmers and brushcutters.
Fits Models:
FS 38, FS 45, FS 46, FS 55, FS 55 C, FS 55 R, KM 55, KM 55 C, KM 55 R, KM 55 RC
Alternate Part Numbers:
4140-120-0631, 4140 120 0622, 41401200631, 41401200622
Product Specifications
| L&S Part No. | 4140 120 0631 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41401200631 |
| Unit of Sale | 1 |
| Applications | FS 38, FS 45, FS 46, FS 55, FS 55 C, FS 55 R, FS38, FS45, FS46, FS55, FS55C, FS55R, KM 55, KM 55 C, KM 55 R, KM 55 RC, KM55, KM55C, KM55R, KM55RC |
| Machine Type | Brushcutters |
| Fits Brands | Stihl |
| Fits Models | FS38, FS45, FS46 | FS55, FS55C, FS55R | KM55, KM55C, KM55R, KM55RC |
