Garden Parts [Lifetime Warranty] 309375002 Carburetor Kit - Compatible with Ryobi Homelite C430 S430 X430 30cc 4-Cycle String Trimmer RY34001 RY34421 RY34441 RY34007 RY34426 RY34446
309375002 carburetor kit for Ryobi and Homelite 30cc 4-cycle engines including carburetor, spark plug, and fuel lines.
309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmers shown with engine operation graphic.
309375002 carburetor kit components including carburetor, spark plug, fuel filter, gaskets, fuel lines, bulbs, and grommet.
309375002 carburetor kit for Ryobi and Homelite 30cc engines with dimensioned technical specifications diagram.
309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmer engines.
Diagram of 309375002 carburetor for Ryobi and Homelite engines highlighting ports and adjustment screws.
Four-angle product detail view of 309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmers.
Fuel line assembly with fuel filter and grommet for Ryobi and Homelite 30cc 4-cycle string trimmer engines.
Person using a Ryobi string trimmer to illustrate engine symptoms fixed by the 309375002 carburetor kit.
309375002 carburetor kit for Ryobi and Homelite 30cc 4-cycle engines including carburetor, spark plug, and fuel lines.
309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmers shown with engine operation graphic.
309375002 carburetor kit components including carburetor, spark plug, fuel filter, gaskets, fuel lines, bulbs, and grommet.
309375002 carburetor kit for Ryobi and Homelite 30cc engines with dimensioned technical specifications diagram.
309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmer engines.
Diagram of 309375002 carburetor for Ryobi and Homelite engines highlighting ports and adjustment screws.
Four-angle product detail view of 309375002 carburetor for Ryobi and Homelite 30cc 4-cycle string trimmers.
Fuel line assembly with fuel filter and grommet for Ryobi and Homelite 30cc 4-cycle string trimmer engines.
Person using a Ryobi string trimmer to illustrate engine symptoms fixed by the 309375002 carburetor kit.
Lifetime Warranty

[Lifetime Warranty] 309375002 Carburetor Kit - Compatible with Ryobi Homelite C430 S430 X430 30cc 4-Cycle String Trimmer RY34001 RY34421 RY34441 RY34007 RY34426 RY34446

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309375002 Carburetor Kit

Key Features

  • Direct replacement carburetor for 30cc 4-cycle engines.
  • Complete kit includes carburetor, gaskets, fuel lines, primer bulb, and spark plug.
  • Engineered to original equipment specifications for proper fit and function.
  • Restores engine starting, fuel efficiency, and overall performance.

Replaces / Cross-Reference Part Numbers

  • Ryobi / Homelite: 309375002, 309370002, 309375010
  • Walbro: 20016-81020, 20016-81021

Compatibility & Fitment

  • Brands: Ryobi, Homelite
  • Engine: 30cc 4-Cycle / 4-Stroke
  • Ryobi Models: C430, S430, X430, RY13016, RY34001, RY34005, RY34006, RY34007, RY34421, RY34422, RY34425, RY34426, RY34441, RY34442, RY34445, RY34446
  • Homelite Models: C430, S430, X430
  • Note: May not be compatible with certain 2017 Ryobi S430 models. Verify part number before ordering.

When to Replace

  • Engine fails to start, idles roughly, or stalls frequently.
  • Visible fuel leakage from the carburetor body.
  • Poor acceleration or loss of power under load.
  • Engine requires excessive choke to run.
  • Increased fuel consumption or black smoke from exhaust.

Installation Tips

  • Disconnect the spark plug wire before beginning any work.
  • Take a photo of the fuel line and throttle linkage connections before disassembly.
  • Ensure all old gasket material is removed from mounting surfaces.
  • Use the new gaskets provided in the kit for a proper seal.
  • Minor idle or air/fuel mixture adjustments may be necessary after installation.

FAQ

This carburetor kit is used on Ryobi and Homelite 30cc 4-cycle equipment that uses carburetor part numbers 309375002, 309370002, or 985624001. Confirmed model references include Ryobi S430/C430/X430 series trimmers such as RY34421, RY34422, RY34425, RY34426, RY34427, RY34441, RY34442, RY34445, RY34446, and RY34447, plus power head and related models RY34001, RY34005, RY34006, RY34007, RY13016, and RY4CPH. Matching by both model number and carburetor part number is the safest way to verify fit.
This kit is associated with OEM part numbers 309375002, 309370002, and 985624001. Some cross-references also list 20016-81020 and 20016-81021 for this carburetor family. Always compare the number on your original carburetor or your equipment's parts diagram before ordering.
Typical carburetor-related symptoms include hard starting, only running on choke, rough or surging idle, stalling when the throttle is opened, bogging under load, fuel flooding, or a trimmer that starts but will not accelerate past idle. On these 30cc 4-cycle trimmers, a clogged carburetor, stiff metering diaphragm, or restricted fuel flow are common causes.
The most common causes are stale fuel, ethanol-related varnish buildup, debris from an aging fuel line or tank grommet, and a dirty fuel filter. Long storage with fuel left in the system can gum up the internal passages and diaphragms. If the old carburetor failed, it is smart to inspect the fuel lines, primer bulb, tank filter, and intake gasket so the new carburetor does not develop the same problem.
Installation is usually straightforward for someone comfortable with small-engine repairs. In many cases it takes about 5 to 20 minutes. Typical tools are a screwdriver, needle-nose pliers, and possibly a nut driver or socket depending on your trimmer model. Before removal, take a photo of the throttle linkage, fuel line routing, and gasket order so the replacement goes back on correctly.
Drain old fuel from the tank, inspect the fuel lines for cracking or soft spots, check the tank grommet for leaks, and replace a dirty fuel filter if included in your kit. Also inspect the air filter and spark plug, because restricted airflow or a fouled plug can mimic carburetor problems. If the engine still ran poorly with the old carburetor, verify that the intake mounting surface and gaskets are sealing properly to prevent an air leak.
Yes, this carburetor family is used on several 30cc 4-cycle Ryobi and Homelite machines, including string trimmers and some attachment-capable power head models. Examples from compatibility references include trimmers in the S430, C430, and X430 families, as well as power head models like RY34001, RY34005, RY34006, RY34007, and RY4CPH. Because attachments do not determine carburetor fit, verify the actual engine model and carburetor part number on the unit.