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Description
4147 121 4700 Metering Diaphragm | Genuine STIHL OEM Replacement
The 4147 121 4700 Metering Diaphragm is a genuine STIHL OEM replacement component designed for compatible carburetors used on STIHL professional brushcutters. The metering diaphragm is an important part of the carburetor fuel-metering system, helping regulate fuel delivery according to the engine's operating demand.
This diaphragm is used with specific WTF-series carburetor configurations on select FS 240, FS 360 C-E, FS 460 C-EM, and FS 461 C-EM models.
Features That Make a Difference
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Genuine STIHL OEM replacement part
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Part Number: 4147 121 4700
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Alternate Part Number: 41471214700
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Product Type: Metering Diaphragm
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Designed for compatible STIHL carburetors.
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Helps regulate fuel metering within the carburetor.
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Supports consistent fuel delivery under changing engine loads.
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Designed to work with specified WTF-series carburetors.
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OEM construction provides proper fit and function.
Benefits
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Replaces a worn, stiff, damaged, or deteriorated metering diaphragm.
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Helps restore proper carburetor fuel metering.
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Supports reliable engine starting and acceleration.
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Helps maintain consistent engine performance.
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Genuine STIHL design ensures compatibility with the specified carburetor.
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Ideal for carburetor repair and maintenance.
Specifications
| Specification | Details |
|---|---|
| Part Number | 4147 121 4700 |
| Alternate Part Number | 41471214700 |
| Product Type | Metering Diaphragm |
| Brand | STIHL |
| System | Carburetor |
| Carburetor Family | WTF Series |
| Applications | FS 240 / FS 360 C-E / FS 460 C-EM / FS 461 C-EM |
| Function | Fuel Metering |
| Use | Carburetor Repair / Replacement |
| Part Type | Genuine OEM Replacement |
Compatibility
The 4147 121 4700 Metering Diaphragm is listed for the following applications:
FS 240
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FS 240 — Carburetor WTF-10, WTF-11, WTF-5, WTF-6
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FS 240 R — Carburetor WTF-10, WTF-11, WTF-5, WTF-6
FS 360
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FS 360 C-E 4147 — Carburetor WTF-10, WTF-11, WTF-5, WTF-6
FS 460
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FS 460 C-EM — Carburetor WTF-7, WTF-12
FS 461
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FS 461 C-EM — Carburetor WTF-12
Carburetor identification is important for this part. Verify the carburetor model stamped or identified on your equipment before ordering.
How the Metering Diaphragm Works
The metering diaphragm is located inside the carburetor's metering chamber. It responds to pressure changes created as the engine operates.
As engine demand changes, the diaphragm moves the carburetor's metering mechanism, allowing the appropriate amount of fuel to enter the carburetor. This helps maintain a suitable fuel supply across different operating speeds and loads.
A healthy diaphragm needs to remain flexible and properly sealed to function correctly.
Signs of a Worn Metering Diaphragm
A deteriorated metering diaphragm can contribute to:
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Hard starting.
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Poor acceleration.
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Rough or unstable engine operation.
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Engine hesitation.
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Inconsistent fuel delivery.
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Loss of power under load.
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Difficulty maintaining engine speed.
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Carburetor tuning problems.
A diaphragm can become stiff, distorted, cracked, or damaged with age and exposure to fuel.
Why Replace the Metering Diaphragm?
The metering diaphragm is a flexible component that can deteriorate over time. When it no longer responds correctly to pressure changes, the carburetor may not meter fuel properly.
Replacing it with the correct STIHL OEM 4147 121 4700 diaphragm can help restore the carburetor's intended fuel-metering operation.
When rebuilding a carburetor, inspect the gasket, pump diaphragm, needle valve, and other internal components as well, since multiple worn components can contribute to similar symptoms.
Important Compatibility Note
This part is not simply determined by the engine model. The correct diaphragm depends on the carburetor configuration.
The supplied parts information identifies the following carburetors:
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WTF-5
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WTF-6
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WTF-7
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WTF-10
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WTF-11
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WTF-12
Always confirm the carburetor type before purchasing.
Why Buy from Barry’s Power Equipment?
Barry’s Power Equipment provides quality OEM and replacement parts for lawn, garden, and outdoor power equipment.
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Genuine OEM replacement parts
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Quality products for residential and commercial equipment
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Competitive Pricing
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Fast Shipping
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Expert Customer Support
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Reliable parts for professional equipment repair and maintenance
Restore proper carburetor fuel metering with the STIHL 4147 121 4700 Metering Diaphragm, a genuine OEM replacement for compatible FS 240, FS 360 C-E, FS 460 C-EM, and FS 461 C-EM carburetor configurations.
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