Description
Overview:
The Pump Diaphragm for Stihl FS56 and FS56C is a genuine Stihl replacement that restores correct fuel pumping inside the carburettor of small two‐stroke machines. This thin, flexible, fuel‐resistant membrane works with crankcase pulse pressure to move petrol from the tank through the carburettor, keeping the engine primed and running smoothly. Made from a durable elastomer/composite sheet designed for modern pump stacks, it helps resolve hard starting, hesitation, and poor throttle response caused by a worn or stiff membrane. It is suitable for a wide range of Stihl brushcutters, blowers, kombi engines and more, offering OEM fit and function with no modification required. Genuine Stihl quality ensures reliable sealing, correct thickness, and hole alignment for dependable performance.
Key Features:
- Genuine Stihl part 4241 121 4800 for assured compatibility and performance
- Fuel‐resistant construction made for petrol, including UK E10 blends
- Restores reliable priming, starting, idling and acceleration
- Precision cutouts align with OEM carburettor bodies for a straightforward fit
- Helps reduce surging and stalling linked to a fatigued pump membrane
- Supports regular maintenance schedules to extend machine life
- Stable performance across a wide range of Stihl trimmers, blowers and kombi tools
- Simple, low‐cost fix that minimises downtime on site or at home
Typical Applications:
Ideal during carburettor services, when engines lose prime, need multiple pulls to start, or show flat spots under load. Commonly used after long storage, when exposed to stale fuel, or where diaphragms have stiffened with age. Suitable for everyday upkeep of Stihl brushcutters, hedge trimmers, blowers, sprayers and kombi units.
Also known as:
Fuel pump membrane, carburettor pump membrane, primer pump membrane, fuel metering membrane, carb pump film, pump membrane gasket.
Fits Models:
BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C, BG56, BG56C, BG66, BG66C, BG86, BG86C, BR 200, BR200, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FS 120, FS 200, FS 250, FS 36, FS 40, FS 40 C, FS 44, FS 50, FS 50 C, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS120, FS200, FS250, FS36, FS40, FS40C, FS44, FS50, FS50C, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, HL 56 K, HL56K, HT 56 C, HT56 C, HT56C, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56 MultiSystem, MM56MultiSystem, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SR 200, SR 200-D, SR 200-Z, SR200, SR200-D, SR200-Z, SR200D, SR200Z
Alternate Part Numbers:
4241-121-4800, 42411214800
Product Specifications
| L&S Part No. | 4241 121 4800 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42411214800 |
| Unit of Sale | 1 |
| Applications | BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C, BG56, BG56C, BG66, BG66C, BG86, BG86C, BR 200, BR200, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FS 120, FS 200, FS 250, FS 36, FS 40, FS 40 C, FS 44, FS 50, FS 50 C, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS120, FS200, FS250, FS36, FS40, FS40C, FS44, FS50, FS50C, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, HL 56 K, HL56K, HT 56 C, HT56 C, HT56C, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56 MultiSystem, MM56MultiSystem, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SR 200, SR 200-D, SR 200-Z, SR200, SR200-D, SR200-Z, SR200D, SR200Z |
| Machine Type | Backpack Blowers, Blower/Shredders, Brushcutters, Kombi Engines, Kombi Tools, Long Reach Hedgetrimmers, Pole Pruners, Mist Blowers |
| Fits Brands | Stihl |
| Fits Models | FS36, FS40, FS44 | FS40, FS50 | FS56, FS56C, FS56R | FS120, FS200, FS250 | BG56 | BG66 | BG86 | BR200 | SH56, SH86 | FS70C, FS70R, FS70RC | HT56 C | KM56C, KM56RC | MM 56 MultiSystem | FC 56 | FC 70, FC 70 C | SR 200 | SR 200-D | SR 200-Z | HL56K |
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