Description
Overview:
The Carburettor C1Q-S56A is a genuine Stihl replacement part designed to restore clean running and reliable power on compatible 2‐stroke machines. Built with a robust die‐cast aluminium body and precision steel/brass metering components, it regulates the air-fuel mixture for consistent starting, smooth idling and good throttle response. This unit is intended for Stihl brushcutters, trimmers and related tools, including popular models such as FR85T and FS85. As a direct replacement for OEM 4137 120 0604, it fits without modification when matched to the correct machine, helping to reduce downtime on site or in the garden. Durable materials and quality manufacture make it suitable for frequent professional use as well as routine DIY maintenance.
Key Features:
- Genuine Stihl part for correct fit and reliable compatibility
- Die‐cast aluminium construction for strength and corrosion resistance
- Calibrated fuel metering for stable idle and smooth acceleration
- Designed for 2‐stroke engines used in brushcutters and trimmers
- Direct replacement for OEM 4137 120 0604 to simplify repairs
- Supports easy cold starts when the system is correctly primed and tuned
- Helps reduce fuel waste and poor running caused by worn or clogged carbs
- Suited to regular commercial service as well as domestic upkeep
- No fabrication required when installed on listed models
- Built to handle dusty, high‐vibration operating environments
Typical Applications:
Restoring performance on Stihl brushcutters, trimmers, hedge trimmers and pole pruners used for grass cutting, brush clearance, edging, hedge work and site maintenance. Ideal when engines struggle to start, fail to hold idle, surge under load, or show signs of flooding due to a worn or contaminated carburettor.
Also known as:
C1Q S56A carb, Stihl FR/FS series carburettor, fuel metering unit for Stihl 2‐stroke engines, carb assembly for FR85/FS85 range, replacement carb for Stihl hand‐held outdoor power equipment.
Fits Models:
FC 73, FC 75, FC 85, FC73, FC75, FC85, FH75, FR85, FR85T, FS75, FS80, FS80R, FS85, FS85R, FS85RX, FS85T, HL75, HL75K, HT70, HT70K, HT75, KW 85, KW85, SP85, SP85K
Alternate Part Numbers:
4137 120 0604, 41371200604
Product Specifications
| L&S Part No. | 4137 120 0604 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41371200604 |
| Unit of Sale | 1 |
| Machine Type | Brushcutters, Trimmers |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part ensures correct fit and compatibility - Die-cast aluminium body resists corrosion - Calibrated fuel metering for stable idle - Direct replacement for OEM 4137 120 0604 - Fits Stihl models including FR85T and FS85 |
| Fits Models | FS75, FS80, FS85 | FR85T, FR85 | HT70, HT70K, HT75 | KW 85 | FC 73 | FC 75 | FC 85 | HL75, HL75K | SP 85 |
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