Products Description
FS120/FS250 Brush Cutter Connecting Pipe – Intake Manifold for STIHL Professional Trimmers
OEM-Spec Intake Pipe for FS120, FS200, FS250 & Compatible Models
This connecting pipe, also known as the intake manifold or rubber intake pipe (OEM 4134 129 3000), is a critical component of the air/fuel delivery system on STIHL FS120, FS200, FS250, and a range of professional brushcutters. It forms the seal between the carburetor and the engine cylinder, channeling the fuel-air mixture into the combustion chamber. A cracked, hardened, or damaged intake pipe allows unmetered air to enter the engine, causing a lean condition that results in hard starting, erratic idling, poor throttle response, loss of power, and potential engine seizure. This OEM-spec replacement restores proper sealing and reliable engine performance for demanding grounds maintenance and landscaping applications.
Technical Profiles & Materials
Critical Intake Seal – This connecting pipe creates an airtight passage between the carburetor and the engine cylinder. A compromised seal is a common cause of hard starting and poor running on FS120/FS200/FS250 brushcutters, often mimicking carburetor problems. Replacing a cracked or hardened pipe resolves these issues without the need for expensive component replacement.
OEM-Spec Replacement Fitment – Replaces STIHL OEM part number 4134 129 3000 (alternative reference 4134-129-3000). This genuine STIHL component is manufactured to exacting standards, ensuring precise fitment and reliable sealing performance. Quality aftermarket alternatives are also available for cost-effective maintenance.
Wide Model Compatibility – Confirmed compatible with an extensive range of STIHL brushcutters, trimmers, and professional equipment, including:
Brushcutters: FS120, FS120R, FS200, FS200R, FS250, FS300, FS350, FS400, FS400-K, FS450, FS480
Other Equipment: FR350, FR450, FR480, SP200, SP400, SP450, SP451, BT120C, BT121
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part Number | 4134 129 3000 |
| 2 | Alternative OEM Ref. | 4134-129-3000 |
| 3 | Compatible Models | FS120, FS120R, FS200, FS200R, FS250, FS300, FS350, FS400, FS400-K, FS450, FS480 |
| 4 | Also Compatible | FR350, FR450, FR480, SP200, BT120C, BT121 |
| 5 | Function | Carburetor-to-cylinder intake seal |
| 6 | Material | Fuel-resistant rubber |
| 7 | OEM Option | Genuine STIHL |
| 8 | Unit of Sale | 1 piece or complete engine kit |
Products Application
Brushcutter Performance Restoration
Direct replacement when the engine exhibits hard starting, erratic idle, hesitation, or loss of power on FS120, FS200, and FS250 models. A cracked or hardened intake pipe is a primary suspect for these symptoms, as it allows unmetered air to enter the engine, causing lean running conditions.
Full Engine Overhaul
When performing a complete engine rebuild on professional STIHL brushcutters, the connecting pipe should be replaced alongside the cylinder, piston, crankshaft, bearings, and seals. Comprehensive kits combine the intake pipe with other essential service components, ensuring all wear-prone parts are renewed in a single operation.
Workshop & Professional Maintenance
For landscaping contractors, grounds maintenance crews, and repair centers servicing STIHL FS120, FS200, and FS250 brushcutters, keeping a replacement connecting pipe on hand minimizes downtime. The pre-engineered OEM-spec component ensures consistent repair quality and reliable sealing performance.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this connecting pipe fits my FS120 or FS250?
A:Check your machine model number on the housing. This pipe is confirmed compatible with STIHL FS120, FS120R, FS200, FS200R, FS250, and an extensive range of professional brushcutters including FS300, FS350, FS400, FS400-K, FS450, and FS480. The OEM reference is 4134 129 3000.
Q: What are the symptoms of a cracked intake pipe on a brushcutter?
A: Common symptoms include hard starting, erratic idling, engine surging, hesitation on acceleration, loss of power, and potential engine seizure. A cracked pipe allows unmetered air to enter the engine, causing a lean running condition that can lead to serious engine damage if not addressed promptly.
Q: Can I replace just the connecting pipe or do I need a complete kit?
A: The connecting pipe is available as an individual component (OEM 4134 129 3000). However, comprehensive engine rebuild kits are available that include the connecting pipe alongside cylinder, piston, crankshaft, bearings, seals, fuel line, primer bulb, and air filter components. This is recommended for full engine overhauls to ensure all sealing components are renewed.
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