1. Home
  2. Carburetors
  3. Tillotson
  4. HL-Series
  5. HL-334A, AB, AA
  6. Tillotson 24B-381 Throttle Return Spring
Tillotson 24B-381 Throttle Return Spring
24B-381 Tillotson Throttle Return Spring
Write a Review

Tillotson 24B-381 Throttle Return Spring

Part Number: 24B-381
Online Price: $1.29
Tillotson 24B-381 OEM Throttle Shaft Return Spring – HL & HW Series
Availability: In Stock.

Send to:

*We'll ask for shipping info at checkout

Description

Tillotson 24B-381 OEM Throttle Shaft Return Spring – Fits HL & HW-Series Carburetors


The Tillotson 24B-381 Throttle Shaft Return Spring is an OEM-quality component engineered to maintain consistent tension on the throttle shaft—ensuring that the throttle plate (butterfly) returns to the closed position when throttle input is released.


This spring plays a vital role in safe engine operation by helping prevent runaway RPMs or accidental throttle hang-ups, especially in racing, high-RPM, or handheld 2-stroke engine applications.


Key Features:

  • OEM Part Number: 24B-381
  • Function: Provides return tension to the throttle shaft or butterfly
  • Safety: Helps prevent throttle from sticking open
  • Application-Specific Fit: Designed to match specific Tillotson throttle shaft and carb body styles
  • Durable Construction: Made from high-tension spring steel for long-lasting performance


Fitment & Setup Notes:

Throttle return springs are not universal across all Tillotson models. Each spring is designed for a specific carburetor body and throttle shaft configuration.

If you're unsure which spring you need:

  • Use the carburetor reference charts on our [Technical Resources Page]
  • Or contact our support team with your carb model and application details


Recommended Installation Tip:

For optimal safety, use two forms of throttle return if possible:

  • Throttle shaft return spring (like this one)
  • Secondary return via throttle lever, cable, or linkage rod

Redundant throttle return mechanisms are especially recommended in racing and high-risk equipment setups.


Compatible Tillotson Carburetor Models:

  • HL-227E
  • HL-231E
  • HL-304E, HL-304WX
  • HL-334A, HL-334B, HL-334AA, HL-334AB, HL-334WX
  • HL-348F
  • HL-350A
  • HL-360A
  • HL-375A
  • HL-384A, HL-384B
  • HL-385A
  • HL-388A
  • HW-10A, HW-11A, HW-12A


Ideal For:

  • 2-cycle engine throttle system repair
  • Go-kart, chainsaw, and small engine builds
  • Professional engine tuners and carburetor rebuilders
  • Any application requiring a precise throttle return mechanism

FAQ

Q1: What does the Tillotson 24B-381 throttle return spring do?

A: It provides tension to the throttle shaft, ensuring the throttle plate (butterfly) returns to the closed position when you release the throttle. This helps prevent the engine from over-revving or idling too high.


Q2: Is this return spring compatible with all Tillotson carbs?

A: No. This spring is designed specifically for certain HL and HW series carburetors. Always check compatibility with your carb model or refer to our technical guide.


Q3: What if my throttle doesn't return smoothly?

A: This may be due to a worn or missing return spring, a sticky throttle shaft, or debris in the carburetor. Replacing the return spring is a good first step in diagnosing the issue.


Q4: Can I use more than one return spring?

A: Yes, and it’s recommended. Ideally, you should have two forms of throttle return—such as this shaft return spring and an additional return via throttle lever, cable, or linkage—for added safety.


Q5: How do I know if this spring is the right one for my carb?

A: Check your carburetor model number. The 24B-381 fits specific HL and HW series carbs, including HL-304E, HL-334A, HL-384A/B, and HW-10A. For other models, consult a reference chart or contact support.


Q6: Is this spring included in rebuild kits?

A: Usually not. Most rebuild kits include diaphragms, gaskets, and needles, but not return springs. This part is typically sold separately.

Related Items

Recently Viewed Items