Description

1143 120 0641 STIHL Carburetor 1143/39 (Genuine OEM Part)

The STIHL 1143 120 0641 is a genuine OEM carburetor, model 1143/39, designed to deliver precise fuelair mixture control for reliable engine performance on compatible STIHL chainsaws. This carburetor supports smooth starting, stable idle, responsive throttle operation, and consistent power output under varying operating conditions.

Manufactured to STIHLs original equipment specifications, this carburetor is built with high-quality internal metering components to ensure accurate fuel delivery and dependable long-term operation. Using a genuine STIHL carburetor helps maintain factory engine performance, fuel efficiency, and emissions compliance.

Product Details

Manufacturer Part Number: 1143 120 0641
Brand: STIHL
Part Type: Carburetor
Carburetor Model: 1143/39
System: Fuel system / Air intake system
Function: Regulates fuelair mixture for engine operation
OEM Status: Genuine STIHL OEM replacement

Function

Delivers precise fuelair mixture to the engine
Supports smooth idle and throttle response
Improves starting reliability
Maintains consistent engine performance

Compatible With STIHL Chainsaws

MS 251 C-BE (Carburetor)
MS 231 C-BE (Carburetor bracket, Air filter)

How Its Used

This carburetor installs within the air intake assembly and meters fuel into the engine based on throttle input and operating conditions. It works in conjunction with the air filter and intake system to ensure efficient combustion.

Correct installation and adjustment are essential for optimal engine performance.

Suggested Maintenance

Use clean, fresh fuel mixed to STIHL specifications
Inspect and maintain the air filter regularly
Check for fuel leaks or poor throttle response
Replace the carburetor if adjustment no longer restores proper performance

The STIHL 1143 120 0641 Carburetor (1143/39) is used in OEM-specified fuel system applications where accurate fuel delivery, reliability, and long-term engine performance are essential.