Description
Overview:
This Genuine Stihl metering diaphragm (OEM No. 4134 121 4702) is a flexible fuel‐control membrane that sits inside the carburettor to regulate fuel flow with precision. Manufactured from a fuel‐resistant elastomer with a reinforced centre, it responds to pressure changes to deliver the correct amount of petrol across idle, acceleration, and full load. It is built for demanding, high‐output machines used daily, including backpack blowers and selected brushcutters and hedge trimmers. As a like‐for‐like replacement for worn or stiff diaphragms, it restores smooth starting, stable idle, and consistent power. Engineered for Stihl equipment such as the BR 500 and BR 600, it maintains the original performance characteristics and reliability expected from professional‐grade tools.
Key Features:
- Genuine Stihl part for assured compatibility and correct operation
- OEM reference 4134 121 4702 for accurate identification and replacement
- Fuel‐resistant elastomer construction for durability and long service life
- Maintains precise fuel metering for easier starting and steady idle
- Helps recover throttle response, power delivery, and fuel efficiency
- Correct thickness and profile for Stihl carburettors; no modifications required
- Straightforward to fit during routine carburettor service or rebuild
- Reliable performance in professional, high‐duty environments
Typical Applications:
Used during carburettor servicing or rebuilds to cure hard starting, poor idle, hesitation, or surging caused by a hardened or damaged diaphragm. Suitable for professional landscaping crews, grounds maintenance teams, hire fleets, and home users who need dependable running from Stihl blowers, brushcutters, and hedge trimmers in all‐weather working conditions.
Also known as:
Fuel metering diaphragm, carburettor diaphragm, metering membrane, carb diaphragm, carburettor metering diaphragm, fuel control membrane for Stihl small engines.
Fits Models:
BR 500, BR 500-Z, BR 550, BR 600, BR 600-Z, BR 700, BR 700 X-Z, BR 700-Z, BR 800, BR 800 C-E, BR 800 C-E Z, BR 800 C-E Z Magnum, BR 800 X-Z Magnum, BR500, BR500Z, BR550, BR600, BR600Z, BR700, BR700Z, BR800, FS 120 2-MIX, FS 120 R 2-MIX, FS120, FS200, FS250, HS 82 R, HS 82 R-Z, HS 82 RC-E, HS 82 T, HS 82 T-Z, HS 87 R, HS 87 R-Z, HS 87 T, HS 87 T-Z, HS82R, HS82T, HS87, HS87R, HS87T
Alternate Part Numbers:
4134 121 4702, 4134-121-4702, 41341214702
Product Specifications
| L&S Part No. | 4134 121 4702 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41341214702 |
| Unit of Sale | 1 |
| Applications | BR 500, BR 500-Z, BR 550, BR 600, BR 600-Z, BR 700, BR 700 X-Z, BR 700-Z, BR 800, BR 800 C-E, BR 800 C-E Z, BR 800 C-E Z Magnum, BR 800 X-Z Magnum, BR500, BR500Z, BR550, BR600, BR600Z, BR700, BR700Z, BR800, FS 120 2-MIX, FS 120 R 2-MIX, FS120, FS200, FS250, HS 82 R, HS 82 R-Z, HS 82 RC-E, HS 82 T, HS 82 T-Z, HS 87 R, HS 87 R-Z, HS 87 T, HS 87 T-Z, HS82R, HS82T, HS87, HS87R, HS87T |
| Machine Type | Backpack Blowers, Brushcutters, Hedgetrimmers |
| Fits Brands | Stihl |
| Fits Models | FS120, FS200, FS250 | BR500 | BR600 | BR700 | HS87 |
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