Description
4149 120 1800 STIHL Filter – Genuine OEM Part
The STIHL Filter (4149 120 1800) is a genuine OEM filter designed for use on select STIHL trimmers and hedge trimmers (serial number ranges apply).
This OEM filter is used in the engine / fuel system area (varies by model) to help protect critical components by filtering contaminants. Replacing a clogged, dirty, or damaged filter helps maintain reliable fuel delivery, smooth engine performance, and long-term durability.
Manufactured to STIHL factory specifications, this OEM filter provides correct fitment, proper filtration, and dependable performance.
Product Details
OEM Part Number: 4149 120 1800
Brand: STIHL (Genuine OEM)
Part Type: Filter
Application: Engine / Fuel System (varies by model)
Condition: New Genuine OEM Part
Function
This OEM filter is designed to:
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Filter contaminants to protect engine / fuel system components
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Maintain consistent fuel flow (where applicable)
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Improve reliability and stable running
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Replace clogged, dirty, or damaged filters
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Support proper engine performance and long service life
⚠️ A clogged filter can cause fuel restriction, hard starting, stalling, and loss of power.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4149 120 1800
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Your STIHL model is listed below
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Your machine serial number matches the range shown
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Part location matches your parts diagram
⚠️ Always verify fitment by OEM part number and serial number for best accuracy.
Compatibility (Fits STIHL Models)
(Serial number range applies)
Hedge Trimmers / Long-Reach Units
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HL 91 K (Engine from serial number 516095589)
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HL 94 (Engine up to serial number 514368761)
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HL 94 K (Engine up to serial number 514368761)
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HL 94 KC-E (Engine up to serial number 514368761)
Trimmers / Brushcutters
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FS 94 R (Engine up to serial number 514309587)
Installation Notes
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Turn off engine and allow it to cool
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Access the filter location based on your model diagram
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Remove the old filter carefully
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Install STIHL OEM filter 4149 120 1800
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Reassemble and confirm secure fitment
⚠️ Make sure the filter is installed in the correct direction if applicable.
Maintenance Tips
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Replace filter as part of routine maintenance
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Inspect if engine shows signs of fuel restriction
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Keep fuel system clean and use fresh fuel
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Use genuine STIHL OEM filters for correct fit and filtration performance
