Stihl BR420 Intake Flange 4203 120 2205

STIHL Carburetor Insulating Spacer / Intake Flange – OEM 4203 120 2205

Genuine STIHL Blower Intake Spacer for BR420, BR320L, BR340L & More

Maintain proper engine performance and protect your carburetor system with this genuine STIHL carburetor insulating spacer (OEM part number 4203 120 2205). Designed for STIHL backpack blowers, this intake flange / carburetor spacer ensures correct airflow, heat insulation, and secure mounting between the carburetor and engine.

🔧 Product Overview

The STIHL 4203 120 2205 intake spacer is a critical component that sits between the carburetor and engine intake, helping to reduce heat transfer, maintain fuel efficiency, and ensure stable engine operation.

Manufactured to STIHL’s OEM specifications, this carburetor insulating block provides a precise fit and reliable seal, preventing air leaks and optimizing performance. It is ideal for replacing cracked, warped, or worn spacers that can lead to poor running, hard starting, or inconsistent engine performance.

⚠️ Note: This listing is for the spacer only (center component in diagram).
Gaskets and mounting hardware are NOT included.

✅ Key Features

• Genuine STIHL OEM Part – Guaranteed compatibility and performance
• Part Number: 4203 120 2205 (also listed as 42031202205)
• Carburetor Insulating Spacer – Reduces heat transfer from engine to carburetor
• Improves Engine Efficiency – Helps maintain consistent fuel-air mixture
• Prevents Air Leaks – Ensures proper sealing between intake components
• Durable Construction – Built to withstand heat, vibration, and fuel exposure
• Precision OEM Fit – Direct replacement with no modifications required
• Easy Installation – Uses existing mounting points (gaskets/bolts sold separately)

⚙️ Compatibility

This STIHL carburetor spacer / intake flange fits a range of backpack blowers, including:

• STIHL BR320L
• STIHL BR340L
• STIHL BR420

(Fits many additional models – always confirm part number before purchase.)

🛠️ Typical Applications

• Replacing cracked or damaged carburetor spacers
• Fixing air leaks or poor engine performance
• Restoring proper carburetor insulation and airflow
• Routine maintenance and blower refurbishment
• Professional landscaping and grounds maintenance equipment servicing

🔄 Also Known As

• STIHL intake spacer
• Carburetor insulating block
• Intake flange STIHL blower
• Carburetor spacer plate
• Engine intake insulator

🌲 Why Choose Genuine STIHL Parts?

Using a genuine STIHL spacer 4203 120 2205 ensures:

• Perfect OEM fit and airtight sealing
• Improved engine performance and reliability
• Reduced heat transfer to carburetor components
• Longer service life compared to aftermarket parts

📦 Product Specifications

• Manufacturer: STIHL
• Part Number: 4203 120 2205
• Alternate Format: 42031202205
• Part Type: Carburetor Insulating Spacer / Intake Flange
• Unit of Sale: 1 (Spacer Only – No Gaskets or Bolts Included)
• Machine Type: Backpack Blower
• Fits Brand: STIHL

🚚 Built for Professional & Everyday Use

This STIHL BR420 / BR340L carburetor spacer is ideal for professional landscapers, contractors, and homeowners who need reliable performance from their blower equipment.