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Inlet Needle Spring for Honda GX390 & Big Block Clone Carburetors
Inlet Needle Spring for Honda GX390 & Big Block Clone Carburetors
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Inlet Needle Spring for Honda GX390 & Big Block Clone Carburetors

Part Number: 188F-38
Online Price: $0.99
Fuel Inlet Needle Spring – Fits GX390 & Clone Engine Carburetors
Availability: In Stock.

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Description

Inlet Needle Spring for Honda GX390, Predator 420 & Big Block Clone Carburetors


This inlet needle spring is a critical component in the fuel delivery system of Honda GX390-style and Big Block Clone carburetors, including Predator 420 and Wildcat 460 engines.


The spring maintains tension on the inlet needle, keeping it seated properly against the float. This helps regulate fuel flow into the carburetor bowl, preventing flooding and ensuring consistent performance under varying load and throttle conditions.


Whether you’re rebuilding a stock carburetor or troubleshooting fuel delivery issues, replacing a worn or weak inlet needle spring can restore proper float function and improve engine reliability.


Key Features:

  • Maintains tension on the inlet needle to control fuel flow
  • Prevents needle from unseating or sticking during operation
  • Essential for proper float function and fuel bowl regulation
  • OEM-style fit for GX390 and clone carburetors
  • Ideal for carburetor rebuilds and tuning


Compatibility:

  • Honda GX390
  • Predator 420
  • Wildcat 460
  • Most GX390-style big block clone engines with stock or Ruixing-style carburetors

FAQ

Q1: What does the inlet needle spring do?
A: The inlet needle spring provides tension on the fuel inlet needle, helping it stay seated against the float and properly control fuel flow into the carburetor bowl.


Q2: What happens if the spring is missing or worn?
A: Without proper spring tension, the needle may not seat correctly, leading to fuel flooding, overflow, or engine stalling due to an overly rich mixture.


Q3: Will this fit all GX390-style carburetors?
A: It fits most OEM-style and Ruixing GX390 clone carburetors, including Predator 420 and Wildcat 460 engines. If you’re using an aftermarket carb, check compatibility before ordering.


Q4: Is this spring included in a carburetor rebuild kit?
A: Some full rebuild kits may include it, but many do not. It’s often sold individually for more targeted repairs or replacements.


Q5: How do I know if my inlet spring needs replacement?
A: If you're experiencing fuel leaks, flooding, or the float isn't functioning properly, it's a good idea to inspect and replace the needle, seat, and spring as a set.

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