Tapa Recoil Starter & Carburetor Kit for Honda GX340/GX390/GX420 (11–16HP) — Adjustable Carb, Tune-Up Parts

Tapa's all-in-one service kit replaces worn carburetor, recoil starter and tune-up parts for Honda GX340/GX390/GX420 11–16HP engines.

Keep your small engine equipment running reliably with a comprehensive replacement pack designed to fit popular GX-series engines and many 420cc clones. This kit gathers the most commonly needed wear items — adjustable carburetor with sediment bowl, complete recoil starter assembly, air filter, ignition parts, fuel and oil fittings, gaskets and mounting hardware — so you can restore starting, fueling and basic tune-up functions in one repair session. It’s presented for DIY mechanics, maintenance pros and anyone who runs pressure washers, pumps, compressors, log splitters or other power equipment with these engines.

How does this kit restore a seized or worn carburetor?

The kit includes an adjustable carburetor that replaces common OEM part numbers and brings back tunability lost with many aftermarket non-adjustable units. Its removable sediment bowl simplifies cleaning and helps prevent debris from reaching the float bowl.

• Adjustable main and idle screws for on-the-spot tuning
• Sediment bowl for easy debris removal
• Gasket set and fuel lines to ensure leak-free connections
• Compatibility with 337–420cc GX-series engines and many 420cc aftermarket motors

What does the recoil starter assembly include and why replace it?

The recoil starter in this kit comes complete with rope, pulley and spring preassembled so you swap it in fast and restore dependable pull-start operation. Replacing a frayed rope or a weak spring eliminates poor engagement and intermittent recoil issues that prevent a quick start.

• Durable starter rope and reinforced pulley
• Pre-tensioned recoil spring for consistent rewind action
• Mounting bolts and dowel pins for correct alignment
• Direct fit for GX340, GX390 and many 420cc engines

What tune-up and ignition parts are included for routine maintenance?

Beyond the carb and starter, the kit supplies items used in typical rebuilds: air filter, spark plug, ignition coil, on/off switch and oil alert parts. Having these on hand reduces repeat trips to the parts counter and ensures matched components during reassembly.

• High-flow replacement air filter to protect the carburetor
• Ignition coil and mounting hardware for reliable spark
• Spark plug and fuel/oil fittings to complete the service
• Muffler and valve cover gaskets included for head or cover work

Will this kit fit my equipment and which engines are supported?

The kit was curated to suit Honda GX340, GX390 and GX420 families and many aftermarket 420cc engines sold by third parties. It matches common OEM part numbers and fits applications such as pressure washers, water pumps, air compressors, chippers and log splitters.

• Fits 337cc, 338cc, 340cc, 389cc, 390cc and 420cc displacement variants
• Compatible with 11 HP, 13 HP and 16 HP engine models
• Replaces a range of OEM carb and starter part numbers referenced by GX-series units
• Works on both original Honda engines and many Harbor Freight/aftermarket 420cc units

Who this is for: This Tapa kit is aimed at owners and technicians who want a single-purchase solution for common GX-series repairs — ideal for DIY engine rebuilds, shop technicians doing routine overhauls, and owners of pressure washer, pump or splitter fleets who need to minimize downtime. It’s not a precision OEM part replacement for specialized race or emissions-tuned engines, but it provides an economical, largely plug-and-play option for restoring everyday performance and start-up reliability.