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Tillotson 24B-291 Throttle Shaft Return Spring
24B-291 Tillotson Throttle Shaft Return Spring
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Tillotson 24B-291 Throttle Shaft Return Spring

Part Number: 24B-291
Online Price: $1.29
Tillotson 24B-291 OEM Throttle Shaft Return Spring
Availability: In Stock.

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Description

Tillotson 24B-291 Throttle Shaft Return Spring


The Tillotson 24B-291 Throttle Shaft Return Spring is a genuine OEM part designed to provide consistent tension on the throttle shaft, helping ensure that the throttle plate (butterfly valve) returns to the closed position when throttle input is released.


This spring is essential for maintaining safe and predictable throttle operation, particularly in high-revving 2-stroke applications. It's designed to work specifically with select Tillotson carburetor models, where fitment and tension are carefully calibrated for the throttle shaft design.


Key Features:

  • OEM Part Number: 24B-291
  • Function: Maintains spring-loaded tension on the throttle shaft
  • Purpose: Ensures throttle butterfly closes when not engaged
  • Material: Corrosion-resistant spring steel
  • Fitment-Specific: Designed for exact fit with compatible Tillotson carbs


Installation & Fitment Notes:

  • Each throttle return spring is engineered to match the body and shaft geometry of specific Tillotson carburetors.
  • If you're unsure about compatibility, consult our carburetor reference sheet on the technical support page or contact us directly.
  • We highly recommend using two forms of throttle return systems whenever possible — e.g., a combination of throttle shaft spring, throttle lever spring, and/or external cable return spring — for added safety and reliability.


Recommended For:

  • Small engine tuners and builders
  • High-performance or racing 2-cycle engines
  • Replacing worn or lost throttle shaft springs
  • Preventing throttle "stick" or hang at idle

FAQ

Q1: What does the 24B-291 throttle return spring do?

A: It applies spring tension to the throttle shaft to ensure the throttle butterfly valve closes properly when throttle input is released, helping maintain engine control and idle stability.


Q2: Which carburetors is this spring compatible with?

A: The 24B-291 spring is designed for specific Tillotson carburetor models. Always verify your carb model or consult our carburetor reference guide before ordering. If unsure, contact us for confirmation.


Q3: Why do I need a throttle return spring?

A: A return spring ensures that the throttle automatically closes when not engaged, preventing runaways, hanging RPMs, or unexpected acceleration — especially important in racing or high-RPM applications.


Q4: Can I use this as the only return spring on my engine?

A: We recommend using two forms of throttle return (e.g., throttle shaft spring + cable or lever return spring) to maximize safety and reliability — particularly for racing, go-karts, or handheld power tools.


Q5: How do I know if my current spring needs replacing?

A: Replace your throttle return spring if:

  • The throttle is slow to return to idle
  • You feel inconsistent tension or stickiness in throttle operation
  • The spring appears worn, bent, rusted, or stretches

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