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Description
1139 120 0630 Carburetor | Genuine STIHL OEM Replacement for MS 171
The STIHL 1139 120 0630 Carburetor is a genuine STIHL OEM replacement carburetor designed for the MS 171 chainsaw. The carburetor is a critical engine component that meters the fuel and air mixture supplied to the engine for combustion and proper operation.
Features That Make a Difference
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Genuine STIHL OEM replacement part
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Part Number: 1139 120 0630
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Alternate Part Number: 11391200630
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Product Type: Carburetor
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Designed for the STIHL MS 171.
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Used in the air filter / manifold assembly.
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Designed to provide proper fuel-air metering.
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OEM-engineered for proper fit and engine performance.
Benefits
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Replaces a worn, damaged, or malfunctioning carburetor.
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Helps restore proper fuel and air delivery to the engine.
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Can help correct poor starting and inconsistent engine operation when the carburetor is the cause.
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Genuine STIHL construction provides proper fit and compatibility.
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Ideal for chainsaw repair and engine maintenance.
Specifications
| Specification | Details |
|---|---|
| Part Number | 1139 120 0630 |
| Alternate Part Number | 11391200630 |
| Product | Carburetor |
| Brand | STIHL |
| Product Type | Engine Carburetor |
| Application | MS 171 |
| Assembly | Air Filter / Manifold |
| Part Type | Genuine OEM Replacement |
Compatibility
The 1139 120 0630 Carburetor is listed for:
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MS 171 — Air filter / Manifold
Always verify your exact model and current STIHL parts diagram before ordering.
What Does the Carburetor Do?
The carburetor controls the mixture of fuel and air supplied to the engine. This mixture must be properly metered for the engine to start, idle, accelerate, and operate correctly.
The carburetor works together with the air filter, manifold, fuel system, throttle control, and engine to provide the proper combustion mixture.
Signs of a Carburetor Problem
A carburetor may require inspection or replacement if the chainsaw experiences:
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Difficulty starting.
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Poor or unstable idle.
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Engine hesitation during acceleration.
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Loss of engine power.
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Engine stalling.
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Poor throttle response.
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Fuel leakage around the carburetor.
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An engine that will not maintain proper operation after the fuel and air systems have been serviced.
Other components can cause similar symptoms, so the fuel system, air filter, fuel lines, and ignition system should also be inspected before replacing the carburetor.
Installation Note
Carburetor replacement requires careful installation and adjustment.
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Shut off the chainsaw and allow the engine to cool completely.
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Remove the applicable air-filter housing components.
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Disconnect the fuel and control connections as required.
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Remove the existing carburetor.
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Inspect the manifold, fuel lines, and related components.
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Install the 1139 120 0630 Carburetor correctly.
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Reconnect all applicable fuel and throttle connections.
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Check for proper operation and fuel leaks.
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Follow the applicable STIHL procedure for carburetor adjustment and engine testing.
Do not operate the chainsaw if fuel is leaking or the throttle system is not functioning correctly.
Important Compatibility Note
The supplied application information identifies this carburetor specifically for the STIHL MS 171 in the Air Filter / Manifold assembly.
Always confirm the exact model and parts diagram before ordering, as carburetor specifications can vary between model versions.
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 the fuel-and-air delivery system of your compatible STIHL chainsaw with the STIHL 1139 120 0630 Carburetor, a genuine OEM replacement for the MS 171.
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