FitBest Carburetor for Honda GX390 13HP, GX340 11HP Engines and 5KW-8KW Chinese Generators – Replaces Honda 16100-Z5R-743 Carb


SKU B07589XFJR Category


Reliable starting and smooth performance from your Honda engine or Chinese generator depends on having a quality carburetor. This new carburetor from FitBest is a great replacement for worn out or damaged Honda carburetors on GX340 and GX390 engines. It also fits many popular Chinese made 5KW to 8KW generators.

Replaces Honda Carburetor 16100-Z5R-743 on GX390 & 16100-Z5L-F11 on GX340

The FitBest carburetor is a direct replacement for Honda part number 16100-Z5R-743 on GX390 engines. It also replaces Honda 16100-Z5L-F11 used on GX340 engines. This high quality aftermarket carburetor equals or exceeds Honda OEM parts in fit and performance.

Fits Many Chinese 5KW to 8KW Generators

In addition to Honda GX engines, this carburetor is commonly used on many Chinese made generators from brands like Genmac, Buffulo Tools, Powerland, and more. It fits popular 5KW, 6KW, 7KW, and 8KW generators that use Honda GX340 or GX390 clone engines. Match your engine specs to ensure fitment.

Complete Carburetor with Gaskets & Installation Hardware

This FitBest carburetor kit includes the carburetor assembly, air filter, fuel filter, and all necessary gaskets, o-rings, jets, fuel lines, and installation hardware for a complete repair. High quality components ensure smooth throttle response, quick starting, and optimal engine performance.

Easy Bolt-On Installation

Installing this replacement carburetor is simple with basic tools. Detailed instructions are included to guide you through the quick bolt-on procedure. Proper installation ensures your engine runs cleanly and efficiently for years to come. No special tuning required.


  • Carburetor Type: Float
  • Number of Cylinders: 1
  • Engine Type: Horizontal Single Cylinder 4-Stroke OHV
  • Displacement: 389cc (GX390), 338cc (GX340)
  • Bore x Stroke: 88mm x 64mm (GX390), 82mm x 64mm (GX340)
  • Start Method: Recoil Pull Start
  • Fuel Type: Gasoline
  • Fuel Maximum Output: 13HP (GX390), 11HP (GX340)

Why Choose a FitBest Carburetor?

FitBest has 20+ years experience producing replacement carburetors for small engines. Their carbs are made to strict quality control standards for reliable performance. Choosing FitBest means you get:

  • Direct Replacement – Precisely engineered to match OEM parts.
  • Robust Construction – Durable metal and plastic composite body.
  • Easy Installation – Simple bolt-on procedure with included hardware.
  • Smooth Operation – Tuned for optimal throttle response.
  • Fuel Efficiency – Proper air/fuel mixture for clean combustion.
  • Reliable Starting – Consistent cold starting ability.
  • Warranty – 1 year manufacturer limited warranty.

What’s Included:

  • Carburetor Assembly
  • Air Filter
  • Fuel Filter
  • Carburetor Gasket
  • Insulator Gasket
  • Insulator
  • Carburetor Bolts
  • Fuel Line with Filter
  • Throttle Return Spring
  • Choke Return Spring
  • Installation Manual

Compatible Replacement For:

  • Honda GX390 16100-Z5R-743
  • Honda GX340 16100-Z5L-F11
  • Honda GX340 QAE2 and QAF2
  • 5KW-8KW Chinese Generator Honda Clone


Does this carburetor fit the Honda GX240 and GX270?
No, this carburetor is for the GX340 and GX390 engines only.

What type of fuel does this carburetor require?
It is designed for standard automotive unleaded gasoline.

Is a fuel shut-off solenoid included?
No, the carburetor does not include a fuel shut-off solenoid. It is the standard float bowl carburetor.

Will this work on a propane or natural gas generator?
No, this carburetor requires gasoline fuel. It will not work with propane or natural gas fuels.

What is the warranty coverage?
This FitBest carburetor has a 1 year manufacturer’s limited warranty. Contact seller for details.

Get the right replacement carburetor for your Honda GX engine or Chinese generator today.


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