Description
Overview:
This Pump Diaphragm is a genuine Stihl replacement part for the fuel pump section of the carburettor, engineered to restore steady fuel delivery and reliable running in demanding use. Made from a fuel‐resistant synthetic membrane designed to flex precisely with the engine's impulse pulses, it keeps your machine starting well, idling cleanly and pulling under load. It is designed for Stihl cut‐off saws and chainsaws, including TS700 and MS660, and replaces worn or stiff diaphragms that can cause hard starting, stalling or poor acceleration. Manufactured to Stihl tolerances, it fits correctly without modification and helps extend the service life of your equipment. Genuine Stihl OEM, MPN 1115 121 4800, for assured compatibility and performance.
Key Features:
- Genuine Stihl OEM part for correct fit and dependable operation
- Restores consistent fuel pumping for easier starting and smooth idle
- Fuel‐resistant construction suited to petrol/oil mix in two‐stroke engines
- Precision‐made to maintain carburettor calibration and throttle response
- Helps prevent bogging, hesitation and power loss under load
- Straightforward to fit during routine carburettor service with standard tools
- Durable design for frequent use in heavy‐duty saws and cut‐off machines
- Reduces unplanned downtime compared with running a worn diaphragm
Typical Applications:
Ideal for routine servicing or repair of Stihl carburettors when engines are hard to start, surge at idle, or lose power on acceleration. Suitable for professional and DIY maintenance of saws and cut‐off saws used in construction, forestry, arborist work and landscaping.
Also known as:
Fuel pump diaphragm, carburettor diaphragm, carb pump membrane, impulse pump diaphragm, carb membrane, replacement pump diaphragm.
Fits Models:
050, 051, 056, 064, 066, 076, MS640, MS650, MS660, MS661, MS661C, MS780, MS880, MS881, P835, P840, TS400, TS700, TS800
Alternate Part Numbers:
1115-121-4800, 11151214800
Product Specifications
| L&S Part No. | 1115 121 4800 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11151214800 |
| Unit of Sale | 1 |
| Applications | 050, 051, 056, 064, 066, 076, MS640, MS650, MS660, MS661, MS661C, MS780, MS880, MS881, P835, P840, TS400, TS700, TS800 |
| Machine Type | Disc Cutters, Chainsaws |
| Fits Brands | Stihl |
| Fits Models | TS400 | MS640 | TS700 | TS800 | MS650 | MS660 | MS661, MS661C | MS780 | MS880 | 050, 051 | 056 | 064 | 076 | 066 | P835, P840 | MS881 |
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