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Tillotson 34-220 Captured Inlet Needle
34-220 Tillotson Captured Inlet Needle
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Tillotson 34-220 Captured Inlet Needle

Part Number: 34-220
Online Price: $4.99
Tillotson 34-220 Captured Inlet Needle for Downward Pump Stack Carburetors
Availability: In Stock.

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Description

Tillotson 34-220 Captured Inlet Needle – OEM Fuel Control for 2-Cycle Engines


Engineered for Precision Fuel Delivery in Downward Pump Stack Carburetors

The Tillotson 34-220 Captured Inlet Needle is a genuine OEM fuel metering component designed for use in Tillotson carburetors with downward-facing pump stacks—commonly found on 2-cycle racing engines. This needle features a dowel stem that is “captured” by the fulcrum arm, ensuring constant, secure contact for more accurate and stable fuel flow control.


The captured design is particularly beneficial in applications where mounting changes, or high-speed performance demand consistent needle positioning and sealing. This results in more reliable throttle response, better idle control, and optimized pop-off pressure, especially in high-RPM 2-cycle racing engines.


Key Features:

  • Part Number: 34-220
  • Design: Captured inlet needle with dowel stem
  • Ideal For: 2-cycle applications with downward-facing pump stack
  • Fuel Compatibility: Gas or methanol (dependent on seat)
  • Function: Regulates and seals fuel flow into metering chamber
  • Compatibility: Select Tillotson carburetors – confirm model fitment


Why Choose OEM? Avoid Aftermarket Pitfalls

One of the most frequent causes of flooding, inconsistent idle, and tuning issues after a carburetor rebuild is using aftermarket inlet needles and seats. These often fail to seal correctly, especially at low speeds or idle, causing excess fuel to leak into the carburetor circuits.


Using a genuine Tillotson 34-220 inlet needle ensures proper sealing, more accurate pop-off pressure, and long-term reliability. Always verify needle and seat performance using a pop-off pressure gauge during assembly.


Fitment Note:

This captured needle is designed for carburetors with downward-mounted pump stacks and is most commonly used in 2-stroke racing engines. Always consult your carburetor model and service listing before ordering.

FAQ

Q1: What is a captured inlet needle?

A: A captured needle includes a dowel or stem that is held in place by the fulcrum arm, maintaining constant contact for reliable fuel flow control.


Q2: What carburetors use the 34-220 needle?

A: It's designed for Tillotson carburetors typically with downward-facing pump stacks, used mostly in 2-cycle racing engines.


Q3: Is this needle compatible with methanol?

A: Yes, as long as it's paired with a compatible methanol-rated inlet seat.


Q4: Why avoid aftermarket inlet needles?

A: Many fail to seal correctly, leading to flooding and inconsistent performance. OEM needles ensure proper pop-off pressure and long-term reliability.


Q5: How do I test if the needle is sealing properly?

A: Use a pop-off pressure gauge to verify that the needle and seat maintain pressure and are not leaking fuel.

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