YAMAKATO Universal Pull Start Assembly for 337–459cc Engines (Fits GX340/GX390) — 4/6-Bolt Recoil with Nylon Wheel & OEM Rope

The YAMAKATO Universal 420 439 459 Pull Start Assembly is a direct-fit replacement recoil starter engineered for both 4-bolt and 6-bolt small engines, including Honda GX340/GX390 and many clones.

This replacement starter is built to restore reliable manual starting to generators, pressure washers, mini bikes, tillers, compressors and other equipment powered by 337–459cc horizontal shaft engines. Constructed with a nylon 66 starter wheel, iron pawl, and supplied with an OEM-grade rope plus extra mounting screws, the unit is sized to match the common GX-series bolt patterns and rachet diameters used by major generator and engine brands.

Which engines and machines will this starter fit?

It covers Honda GX340, GX390 and compatible clone engines spanning 11–15 hp and roughly 337–459cc. It also lists broad compatibility with many popular generators and power equipment brands for those engines.

• Fits GX340/GX390 and clone horizontal engines (11hp–15hp, 337–459cc).
• Commonly used in generators (5000–9500W ranges), pressure washers, log splitters, and compressors.
• Compatible with brands like Generac, Champion, Predator, Honda, Coleman, Powermate, Duromax, Wen, Westinghouse, Pulsar, Firman, Powerstroke, Powerhorse and Ryobi.
• Designed to replace both 4-bolt and 6-bolt recoil assemblies without major modification.

How do I confirm it will replace my current pull starter?

Measure the starter bolt centers and compare pawl type and housing diameters with your current unit before ordering. The listing provides the critical dimensions used for cross-referencing with factory recoil starters.

• Rachet/plastic housing diameters: 54 mm and 81 mm as reference points.
• 6-bolt center-to-center triangle pattern: 172 mm; hole-to-hole through center: 199 mm.
• 4-bolt center-to-center: 172 mm.
• Check the pawl shape in the product image against your stock starter.

What materials and parts are included with the assembly?

The YAMAKATO starter is manufactured beyond typical OEM tolerances using durable materials intended to resist wear from repeated starting. It ships ready to install with common hardware and a replacement rope included.

• 100% nylon 66 starter wheel for low friction and long life.
• Iron plate pawl for durable engagement with the rachet.
• OEM-grade nylon 66 pull rope pre-installed or included separately, depending on pack.
• Extra mounting screws supplied to simplify installation and replace worn fasteners.

Will installation require special tools or modifications?

Most installations are straightforward for DIYers familiar with small engine maintenance. You will need basic hand tools and should verify bolt hole pattern and dimensions before tightening to avoid misalignment.

• Basic socket set and screwdrivers typically suffice.
• No special machining required if bolt centers and housing diameters match.
• Follow torque recommendations for your engine model to prevent damage.
• Compare pawl type and rachet diameter visually before mounting.

Who this product is for: technicians, homeowners and small-fleet managers who need a rugged, widely compatible recoil starter to restore manual starting on GX-series and clone engines. It's suited to anyone maintaining portable generators, pressure washers, pumps, log splitters, go-karts or mini-bikes where the original starter is worn, broken or missing. If you value an OEM-style replacement built with nylon 66 components, iron pawls and extra mounting hardware for a faster return to service, this YAMAKATO assembly is a practical option.