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- 4180 120 2303 STIHL Spacer Flange – Genuine OEM Part
Description
4180 120 2303 STIHL Spacer Flange – Genuine OEM Part
The STIHL Spacer Flange (4180 120 2303) is a genuine OEM replacement spacer flange designed for use on select STIHL professional trimmers, brushcutters, and hedge trimmers.
This spacer flange is installed in the muffler and air filter assembly area to ensure proper spacing, alignment, and secure mounting of related components. Correct spacing is essential for maintaining airflow integrity and component fitment.
Manufactured to STIHL factory specifications, this spacer flange provides the correct dimensions, strength, and durability required for reliable performance under operating conditions.
Replacing a worn or damaged spacer flange helps maintain proper alignment, prevent air leaks, and ensure secure component mounting.
Manufactured to STIHL OEM standards, this spacer flange ensures correct fitment and long service life.
Product Details
OEM Part Number: 4180 120 2303
Brand: STIHL (Genuine OEM)
Part Type: Spacer Flange
Application: Muffler / air filter assembly spacing component (model-specific)
Condition: New Genuine OEM Part
Function
This OEM spacer flange is designed to:
Provide correct spacing between components
Maintain proper alignment in muffler and air filter assemblies
Support secure mounting of related parts
Replace worn or damaged original spacer flanges
Support consistent engine performance
⚠️ A damaged spacer flange may cause misalignment, air leaks, or vibration issues.
Verify Fitment (Recommended)
Before ordering, confirm:
OEM part number 4180 120 2303
Application matches your STIHL parts diagram
Spacer flange location corresponds to muffler and air filter area
⚠️ Always verify fitment by OEM part number and parts diagram, as spacer flanges vary by model.
Compatibility
Fits select STIHL models, including:
FC 90
FC 95
FC 100
FC 110
FS 90 R 4180
FS 90 4180
FS 100 RX
FS 110
FS 110 R
FS 110 RX
HL 90 K
HL 100
HL 100 K
HT 100
HT 101 (⇥ 508613634)
KM 90 R
KM 110 R
(Exact application varies by model and configuration — verify using OEM parts diagram.)
Installation Notes
Turn off engine and allow it to cool
Access muffler and air filter assembly
Remove the existing spacer flange
Install STIHL OEM spacer flange 4180 120 2303 in correct position
Reassemble components securely
⚠️ Improper installation may cause air leaks or component misalignment.
Maintenance Tips
Inspect spacer flanges during routine service
Replace worn components promptly
Use only genuine STIHL OEM spacer flanges for correct fit and durability


