Description
Overview:
This Pump Diaphragm is a Genuine Stihl spare part for maintaining consistent fuel delivery in two-stroke machines such as the Stihl MS230 and MS260 chainsaws. Made from a thin, flexible, fuel‐resistant elastomer, it acts as the pumping element inside the carburettor to move fuel reliably from the tank to the metering circuit. Replacing a hardened or worn diaphragm restores smooth running, easier starting and stable idle. It is designed as a direct-fit component built to Stihl specifications for dependable service life and correct operation. Supplied to OEM No. 1121 121 4801, it is suitable for regular maintenance on professional and domestic machines where accurate fuel metering and responsiveness are essential.
Key Features:
- Genuine Stihl part for assured compatibility and performance
- Direct replacement to OEM spec: 1121 121 4801
- Fuel‐resistant elastomer construction for durability with modern petrol blends
- Restores proper carburettor pump action for reliable starting and throttle response
- Helps prevent lean running, hesitation and poor idle caused by a stiff or cracked diaphragm
- Stable operation under vibration and heat typical of handheld power tools
- Precise fit for consistent sealing and pump stroke
- Simple, non-specialist fitting during routine carburettor service
- Suitable for heavy, regular use by trades and serious DIY users
Typical Applications:
Routine carburettor servicing and repairs on Stihl handheld equipment where fuel delivery has become erratic due to age, ethanol exposure or storage. Common symptoms include hard starting, surging, flat spots and stalling at idle. Fit during scheduled maintenance to chainsaws, brushcutters, blowers and hedge trimmers to maintain performance and reduce downtime.
Also known as:
Pump membrane, carburettor membrane, carb diaphragm, fuel pump membrane, chainsaw pump membrane, carburettor pump film, fuel pump sheet.
Fits Models:
017, 019T, 020, 020T, 021, 023, 024, 025, 026, 028, 028AV, BR320, BR340, BR340L, BR380, BR400, BR420, BR420C, FC 44, FC44, FR410C, FR460TC, FS220, FS240, FS240C, FS240RC, FS260, FS260C, FS260RC, FS280, FS290, FS36, FS360C, FS40, FS410C, FS44, FS460C, FS460RC, FS50, HS60, HS61, MS170, MS170C, MS200, MS200T, MS210, MS210C, MS230, MS230C, MS231, MS240, MS241C, MS250, MS250C, MS251, MS260, MS260C, MS311, MS362, MS362C, MS391
Alternate Part Numbers:
1121-121-4801, 11211214801
Product Specifications
| L&S Part No. | 1121 121 4801 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11211214801 |
| Unit of Sale | 1 |
| Applications | 017, 019T, 020, 020T, 021, 023, 024, 025, 026, 028, 028AV, BR320, BR340, BR340L, BR380, BR400, BR420, BR420C, FC 44, FC44, FR410C, FR460TC, FS220, FS240, FS240C, FS240RC, FS260, FS260C, FS260RC, FS280, FS290, FS36, FS360C, FS40, FS410C, FS44, FS460C, FS460RC, FS50, HS60, HS61, MS170, MS170C, MS200, MS200T, MS210, MS210C, MS230, MS230C, MS231, MS240, MS241C, MS250, MS250C, MS251, MS260, MS260C, MS311, MS362, MS362C, MS391 |
| Machine Type | Chainsaws, Blower/Shredders, Brushcutters |
| Fits Brands | Stihl |
| Fits Models | MS170, MS170C | MS230, MS230C | MS250, MS250C | MS200, MS200T | MS260, MS260C | 028, 028AV | MS240 | MS362, MS362C | FS36, FS40, FS44 | FS40, FS50 | FS220, FS280, FS290 | FS240, FS260 | FS360C FS410C | FS460C, FS460RC | BR320, BR400 | HS60, HS61 | FR410C, FR460TC | 017 | 019T | 020, 020T | 021, 023, 025 | 024 | 026 | MS231, MS251 | MS241C | MS311 | MS391 | FC 44 | FS461 C-EM | FS461 C-EML |
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