WOTIAN Carburetor for Honda GX390 GX340 GX420 & Predator 420cc/389cc Engines

Versatile carburetor for multiple machines

The WOTIAN carburetor is designed as a dependable replacement that works across a range of power units, from classic Honda GX390 setups to GX340 and GX420 pumps, go-karts, and other compatible machines. Built to handle daily use, it aims to deliver a steady air-fuel mix and reliable performance in varied conditions.

Key specifications and fitment

Core dimensions are specified to help you verify a precise match with your intake: throttle bore 27 mm (1.06 in), throat bore 23 mm (0.91 in), and center mounting spacing 52 mm (2.05 in). These measurements support a secure seal and smooth throttle response when installed on compatible carburetor surfaces.

• Throttle hole: 27 mm (1.06 in)
• Throat hole: 23 mm (0.91 in)
• Center mounting hole: 52 mm (2.05 in)

Wide compatibility across engines and pumps

Designed to fit Honda GX390, GX340, and GX420 variants, this carburetor also suits related equipment such as water pumps WT40XK1/WT40XK2/WT40XK3 and select Predator, Champion, Firman engines in the 389–420 cc range, including 11 hp to 13 hp class units. Cross-reference part numbers 16100-Z5T-901 and 16100-ZE3-V01 to confirm compatibility.

• Fits Honda GX390, GX340, GX420 engines
• Compatible with WT40XK1/WT40XK2/WT40XK3 water pumps
• Supports Predator 420cc, Champion 389cc/420cc, Firman 389cc/420cc units

What you get and installation clarity

The package includes essential components to facilitate an uncomplicated replacement: 1 carburetor, 3 gaskets, 1 choke lever, and 1 insulator. Built with quality materials, it emphasizes stable operation and straightforward installation so you can complete swaps with confidence.

• 1 × Carburetor
• 3 × Gaskets
• 1 × Choke lever
• 1 × Insulator

Real-world use cases and benefits

In workshop environments or on job sites, this carburetor can support a range of equipment — from lawn care engines to pressure washers, snow blowers, and go-karts — by providing reliable throttle response and a consistent idle. Benefits are possibilities rather than guarantees, and actual results may vary with machine condition and maintenance.

Installation tips

Before swapping, confirm mounting alignment and gasket compatibility, then connect fuel lines and throttle linkages per your machine’s guidelines. After installation, check for leaks and adjust idle settings according to the manufacturer specs.