Description
Overview:
This Pump Diaphragm (Stihl part number 4116 121 4800) is a Genuine Stihl replacement for the fuel pump section of the carburettor. Made from fuel‐resistant synthetic material designed to withstand petrol and operating heat, it flexes to move fuel reliably through the carburettor. By replacing a hardened, torn, or warped diaphragm, it restores consistent fuel delivery and helps prevent hard starting, poor idle, or hesitation under load. Suitable for a wide range of Stihl tools, including chainsaws such as the 029 and 039, as well as many brushcutters, blowers, and sprayers. Built to OEM specifications for an accurate fit and dependable performance in everyday use.
Key Features:
- Genuine Stihl OEM diaphragm (4116 121 4800) for correct fit and function across listed machines
- Fuel‐resistant construction for durability with modern pump fuels
- Restores carburettor pumping action to improve starting, throttle response, and idle stability
- Maintains consistent fuel delivery under varying loads and temperatures
- Precision‐cut ports align with the carburettor body for reliable sealing
- Broad compatibility across Stihl chainsaws, brushcutters, blowers, and sprayers
- Straightforward installation with basic hand tools to minimise downtime
- Suitable for professional servicing and routine DIY maintenance
Typical Applications:
Used during carburettor repairs, overhauls, or routine services when fuel delivery issues appear, especially after long storage or when running quality has declined. Common in maintenance of Stihl chainsaws, brushcutters, backpack blowers, and mistblowers/sprayers to restore proper fuelling and reliable daily operation.
Also known as:
Fuel pump membrane, carburettor diaphragm, carb pump film, carb pump membrane, diaphragm sheet, fuel metering diaphragm, carb pump gasket/diaphragm.
Fits Models:
028, 028AV, 029, 030, 031, 039, 044, 046, 400, BR320, BR320L, BR340, BR340L, BR380, BR400, BR420, BR420C, FS360, FS360C, FS410C, FS420, FS420L, FS490C, FS500, FS510C, FS550, FS550L, FS560C, GS461, MS270, MS270C, MS280, MS280C, MS290, MS310, MS341, MS361, MS361C, MS390, MS440, MS441, MS441C, MS460, MS461, SR320, SR340, SR400, SR420
Alternate Part Numbers:
4116-121-4800, 41161214800
Product Specifications
| L&S Part No. | 4116 121 4800 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41161214800 |
| Unit of Sale | 1 |
| Applications | 028, 028AV, 029, 030, 031, 039, 044, 046, 400, BR320, BR320L, BR340, BR340L, BR380, BR400, BR420, BR420C, FS360, FS360C, FS410C, FS420, FS420L, FS490C, FS500, FS510C, FS550, FS550L, FS560C, GS461, MS270, MS270C, MS280, MS280C, MS290, MS310, MS341, MS361, MS361C, MS390, MS440, MS441, MS441C, MS460, MS461, SR 320, SR 340, SR 420, SR320, SR340, SR400, SR420 |
| Machine Type | Chainsaws, Brushcutters, Sprayers |
| Fits Brands | Stihl |
| Fits Models | MS290, MS310, MS390 | 030, 031 | 029, 039 | MS270, MS270C, MS280, MS280C | 028, 028AV | MS361, MS361C | MS440 | MS460 | FS360C FS410C | FS500, FS550, FS550L | BR320, BR400 | MS441, MS441C | FS360, FS420, FS420L (older models) | FS490C, FS510C, FS560C | MS341 | MS461 | 044 | 046 | SR 320, 400 | SR 340, SR 420 | GS461 | FS491 C-EM | FS561 C-EM |
