fullas Huayi P27 Carburetor for Honda GX390 / Predator 420cc Engines — OEM-fit, Includes Gaskets & Fuel Line

Fullas Huayi P27 carburetor is a direct-replacement OEM-standard carburetor designed to restore reliable fuel delivery on Honda GX390-compatible 13 HP and similar 420cc engines.

This replacement carburetor is built to the Huayi OEM specification to fit a wide range of small engine equipment that use the Honda GX390/GX340 carburetor pattern. It’s supplied with gaskets, fuel line and clamps so you can swap it in without hunting down additional parts. Use it for pressure washers, water pumps, tillers, generators, mini bikes and other equipment powered by compatible 389–439cc engines.

Will this carburetor fit my Honda GX390 or Predator 420cc engine?

The Huayi P27 follows the common mounting and bore dimensions used on GX390-style carbs, so it fits many engines that accept OEM part numbers 16100-ZH8-W61, 16100-ZF6-V01 and related listings. Always compare your old carburetor’s mounting hole spacing and throttle/ choke linkages to ensure compatibility before installation.

• Mounting hole center-to-center: 43.6 mm
• Core bore diameter: 26.8 mm
• Compatible OEM references included for cross-checking
• Designed for 389–439 cc small engines (GX390/GX340 class)

What comes in the box and what tools do I need?

The package includes the carburetor plus common installation consumables so you can complete a straightforward swap without extra shopping. You’ll still want basic hand tools and a little mechanic knowledge for safe installation and adjustment.

• 1x Huayi P27 carburetor (full replacement body)
• 3x intake/exhaust gaskets to match your mounting faces
• 1x fuel line and 2x hose clamps for secure fuel connection
• Recommended tools: screwdrivers, sockets/wrenches, pliers and a fuel-line cutter

How should I install and adjust the carburetor for best performance?

Install the carburetor on a clean engine intake flange with the supplied gaskets, reconnect throttle and choke linkages, then run basic tuning. Start with factory or carb-specific baseline screw settings and fine-tune idle and mixture for smooth running under load.

• Replace gaskets and tighten bolts to even torque — avoid overtightening
• Reconnect fuel line and secure clamps, check for leaks before starting
• Use baseline idle and mixture screw settings, then adjust for stable idle and acceleration
• Test under normal load (pump running, mower engaged, etc.) to verify tuning

This Huayi P27 unit is manufactured to OEM-style tolerances and is intended for do-it-yourself repairs as well as by small-engine technicians. It’s a practical spare for service vans or as a replacement part in your workshop.

Who is this for: If you operate or service 13 HP (420cc) engines such as Honda GX390-compatible models, Predator 420cc equipment, or pressure washers and water pumps that list the referenced OEM part numbers, this carburetor is a cost-effective replacement option. It’s suitable for mechanics, landscapers, rental shops and owners of pressure washers, log splitters, tillers, mini bikes, ATVs and other equipment that require GX390-style carburetors. Ensure model compatibility by comparing mounting dimensions and part numbers prior to purchase.