[Lifetime Warranty] MS391 Carburetor Kit for Stihl MS311 MS311Z MS391C Walbro WTE-9A WTE-17 Chainsaw - Replaces 1140 120 0601 1140 120 0605 1140 120 0600 | Includes Fuel Filter Spark Plug Fuel Line
Carburetor kit for Stihl MS391 chainsaw including carburetor, air filter, spark plug, fuel line, and fuel filter.
Replacement carburetor for Stihl MS391 and MS311 chainsaws with promotional text overlay.
MS391 chainsaw carburetor kit components including carburetor, air filter, spark plug, fuel line, and filters.
Dimensional diagram of Stihl MS391 chainsaw carburetor, air filter, spark plug, and fuel filter with measurements.
Replacement carburetor for Stihl MS391, MS311, and MS311Z chainsaws with compatibility and part number information.
Replacement carburetor for Stihl MS391 and MS311 chainsaws, featuring detailed close-up views of the aluminum alloy body.
Multi-angle view of Walbro WTE-9A carburetor for Stihl MS391 and MS311 chainsaws.
High-density pleated air filter for Stihl MS391 and MS311 chainsaws showing 99% filtration efficiency.
Replacement carburetor for Stihl MS391 and MS311 chainsaws shown with engine symptom troubleshooting guide.
MS391 carburetor kit including air filter, fuel line, fuel filter, and spark plug for Stihl chainsaws.
Carburetor kit for Stihl MS391 chainsaw including carburetor, air filter, spark plug, fuel line, and fuel filter.
Replacement carburetor for Stihl MS391 and MS311 chainsaws with promotional text overlay.
MS391 chainsaw carburetor kit components including carburetor, air filter, spark plug, fuel line, and filters.
Dimensional diagram of Stihl MS391 chainsaw carburetor, air filter, spark plug, and fuel filter with measurements.
Replacement carburetor for Stihl MS391, MS311, and MS311Z chainsaws with compatibility and part number information.
Replacement carburetor for Stihl MS391 and MS311 chainsaws, featuring detailed close-up views of the aluminum alloy body.
Multi-angle view of Walbro WTE-9A carburetor for Stihl MS391 and MS311 chainsaws.
High-density pleated air filter for Stihl MS391 and MS311 chainsaws showing 99% filtration efficiency.
Replacement carburetor for Stihl MS391 and MS311 chainsaws shown with engine symptom troubleshooting guide.
MS391 carburetor kit including air filter, fuel line, fuel filter, and spark plug for Stihl chainsaws.
Lifetime Warranty

[Lifetime Warranty] MS391 Carburetor Kit for Stihl MS311 MS311Z MS391C Walbro WTE-9A WTE-17 Chainsaw - Replaces 1140 120 0601 1140 120 0605 1140 120 0600 | Includes Fuel Filter Spark Plug Fuel Line

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MS391 Carburetor Kit for Stihl Chainsaw

Key Features

  • Complete aftermarket carburetor replacement kit
  • Designed to meet original equipment specifications for fit and function
  • Kit includes: 1x Carburetor, 1x Fuel Filter, 1x Spark Plug, 1x Fuel Line

Replaces / Cross-Reference Part Numbers

  • Stihl: 1140 120 0601, 1140 120 0605, 1140 120 0600
  • Walbro: WTE-9A, WTE-17

Compatibility & Fitment

  • Stihl MS311
  • Stihl MS311Z
  • Stihl MS391
  • Stihl MS391C
  • Compatible with specified models equipped with Walbro WTE series carburetors

When to Replace

  • Engine fails to start, is difficult to start, or stalls during operation
  • Unstable or rough idling
  • Noticeable loss of power or poor acceleration
  • Black smoke emitting from the exhaust
  • Visible fuel leakage from the carburetor body or fuel lines

Installation Tips

  • Always disconnect the spark plug wire before beginning service
  • Note the routing of fuel lines, throttle linkage, and choke linkage before disassembly
  • It is recommended to replace the fuel filter and fuel line when installing a new carburetor
  • Fine-tuning of the idle and mixture screws may be required after installation to match engine requirements
  • Refer to your chainsaw's service manual for specific procedures and torque specifications

FAQ

This kit is designed for Stihl chainsaws using the Walbro WTE-series carburetor on models MS311, MS311Z, MS391, MS391C, and various MS391-Z / 2-MIX configurations. The safest way to confirm fit is to match both your saw model and the number stamped on your existing carburetor.
This unit replaces Stihl part numbers 1140 120 0601, 1140 120 0605, and 1140 120 0600. It also functions as a direct replacement for Walbro WTE-9A, WTE-17, WTE-17B, WTE-16B, WTE-9-318, and Stihl part number 1140 120 0603. Match the original carburetor number on your saw before ordering, especially if your model has had previous fuel-system repairs.
Typical symptoms include hard starting, needing the choke longer than normal, stalling at idle, bogging under throttle, surging, poor acceleration in the cut, fuel leaking, or a saw that only runs briefly after priming. If fresh fuel, a good spark plug, and a clean air filter do not correct those issues, the carburetor or its internal metering components may be the cause.
The most common causes are stale fuel, ethanol-related varnish buildup, debris from a deteriorating fuel line, and restriction from a dirty fuel filter. On saws that sit for long periods, diaphragms inside the carburetor can stiffen and stop metering fuel correctly. Air leaks at the intake or impulse line can also mimic carburetor trouble, so those should be inspected during diagnosis.
For someone familiar with basic chainsaw service, this is usually a moderate repair that takes about 20 to 45 minutes. Typical tools include a scrench, Torx drivers commonly used on Stihl saws, needle-nose pliers, a pick or hemostat for fuel lines, and a clean work surface. Before removing the old carburetor, note the throttle linkage, fuel-line routing, and any gasket or spacer orientation so reassembly goes back the same way.
Yes. Since this kit includes service items, it is a good time to replace the fuel filter, inspect or replace hardened fuel lines, and install a fresh spark plug if needed. Also check the air filter, intake boot, impulse passage, and fuel tank for contamination. If dirt or old fuel residue remains in the system, a new carburetor can develop the same running problems quickly.
Not always. A carburetor can cause a no-start or start-and-die condition, but you should also verify spark, fuel quality, compression, and that the engine is not flooded. If the saw has spark but only fires on prime or with fuel added manually, the carburetor or fuel delivery system becomes a much more likely cause.