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Tillotson 24B-328 Throttle Shaft Return Spring
24B-328 Tillotson Throttle Shaft Return Spring
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Tillotson 24B-328 Throttle Shaft Return Spring

Part Number: 24B-328
Online Price: $1.29
Tillotson 24B-328 OEM Throttle Shaft Return Spring – HL Carburetors
Availability: In Stock.

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Description

Tillotson 24B-328 OEM Throttle Shaft Return Spring – For HL-Series Carburetors


The Tillotson 24B-328 Throttle Shaft Return Spring is a genuine OEM component engineered to apply tension to the throttle shaft, ensuring the throttle plate (butterfly) reliably closes when throttle input is released. This is a critical part of any 2-stroke carburetor setup—especially for racing, handheld equipment, or high-RPM engines.


Without a properly functioning return spring, you risk throttle hang-ups and inconsistent engine behavior. The 24B-328 provides the precise fit and tension designed for specific Tillotson HL-series carburetors.


Key Features:

  • OEM Part Number: 24B-328
  • Function: Closes throttle butterfly by returning shaft to neutral position
  • Safety Focused: Prevents accidental throttle sticking or over-revving
  • Fitment Specific: Designed for HL-series Tillotson throttle shaft assemblies
  • Material: High-tensile, corrosion-resistant spring steel


Fitment & Compatibility:

Throttle return springs are not universal. Each spring is designed to match the throttle shaft style and body configuration of specific carburetor models. Using the wrong spring may result in poor throttle return or improper fitment.

If you're unsure about compatibility:

  • Refer to our [Carburetor Reference Sheets] on the Technical Support page
  • Or contact our team directly with your carb model number


Recommended Setup Tip:

For maximum safety and throttle responsiveness, use two independent throttle return mechanisms:

  1. This throttle shaft return spring (primary)
  2. An additional return via throttle cable, lever, or rod (secondary)

This dual-return setup is ideal for race engines or applications where safety is critical.


Fits the Following Tillotson HL Carburetors:

  • HL-232E
  • HL-274E
  • HL-293F
  • HL-314G
  • HL-324A
  • HL-339A
  • HL-348A, HL-348B, HL-348C, HL-348D, HL-348E
  • HL-355A, HL-355B, HL-355C, HL-355D, HL-355E
  • HL-360B, HL-360C
  • HL-380A, HL-380B
  • HL-382A


Ideal For:

  • Small engine repair shops
  • 2-stroke engine builders
  • Chainsaws, kart engines, and handheld equipment
  • Replacing worn or missing throttle return springs

FAQ

Q1: What is the purpose of the 24B-328 throttle shaft return spring?

A: This spring applies tension to the throttle shaft, causing the throttle plate (butterfly) to close when the throttle is released. It’s a critical part of safe throttle control on HL-series Tillotson carburetors.


Q2: Will the 24B-328 spring fit all Tillotson carburetors?

A: No. The 24B-328 is designed specifically for select HL-series Tillotson carburetors. Always check compatibility with your carb model or consult our technical fitment resources.


Q3: Why is a throttle return spring important?

A: It ensures the throttle closes properly, preventing throttle hang-ups or uncontrolled RPMs. A weak or missing spring can lead to dangerous engine behavior—especially in racing or high-performance setups.


Q4: Can I rely on just one return spring?

A: While one spring may be functional, it's best practice to use two return mechanisms:

  • One at the throttle shaft (this spring)
  • One at the throttle lever, cable, or linkage
    This dual-return approach improves safety and reliability.


Q5: How do I confirm if this is the correct spring for my carb?

A: Match your carburetor model to the compatibility list. The 24B-328 fits models like HL-232EHL-348A-EHL-355A-E, and others. You can also consult our Carb Spring Fitment Chart or reach out for expert help.


Q6: Is the 24B-328 included in carburetor rebuild kits?

A: Typically not. Most rebuild kits focus on diaphragms, gaskets, and needles. This spring is usually sold separately and should be replaced if your original is worn or missing.

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