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Tillotson 34-229 HW Captured Inlet Needle
34-229 Tillotson HW Captured Inlet Needle
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Tillotson 34-229 HW Captured Inlet Needle

Part Number: 34-229
Online Price: $18.00
Tillotson 34-229 Captured Inlet Needle for HW Series Carburetors
Availability: In Stock.

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Description

Tillotson 34-229 Captured Inlet Needle – OEM Fit for HW Series Carburetors


Precision Fuel Control for Downward-Facing Pump Stack Carburetors

The Tillotson 34-229 Captured Inlet Needle is a genuine OEM component designed for use in HW-series Tillotson carburetors, where precise fuel metering is essential for peak engine performance. This needle plays a key role in regulating fuel flow by opening and sealing the fuel inlet seat as controlled by the fulcrum arm.


Unlike uncapatured inlet needles, the captured-style needle includes an integrated dowel pin or stem that allows the fulcrum arm to stay in direct contact with the needle at all times. This design ensures stable needle operation, fuel volume changes, or varying engine angles—especially important in 2-cycle racing engines where the pump stack faces downward.


Key Features:

  • Part Number: 34-229
  • Type: Captured Fuel Inlet Needle
  • Application: All Tillotson HW Series carburetors
  • Fuel Compatibility: Gasoline or methanol, depending on seat
  • Function: Seals fuel inlet seat and regulates flow under pressure
  • Engine Type: Ideal for 2-cycle applications with downward-facing pump stacks


Avoid Aftermarket Failures

One of the most common causes of flooding and idle issues in rebuilt carburetors is the use of low-quality aftermarket needles and seats. These often fail to seal properly, causing fuel to bypass the needle—especially noticeable from the high-side circuit during idle and low-speed operation.

For best results, always use a pop-off pressure gauge during assembly to verify correct needle/seat sealing and maintain consistent engine performance.


Fitment Note:

The Tillotson 34-229 Captured Needle fits all HW-series carburetors. Always refer to your carburetor model number or service diagram to confirm proper fitment before ordering.

FAQ

Q1: What does a captured inlet needle do?

A: It regulates fuel entry into the carburetor by sealing the inlet seat, with the fulcrum arm “capturing” the needle to ensure constant contact and stability.


Q2: What carburetors does the 34-229 needle fit?

A: It fits all Tillotson HW series carburetors, commonly used in 2-cycle racing and performance applications.


Q3: Why choose a captured needle over a standard one?

A: Captured needles offer more consistent sealing and are ideal for setups where the carburetor is mounted vertically or inverted, such as in karting or chainsaws.


Q4: Can I use aftermarket needles?

A: It’s not recommended. Aftermarket needles frequently cause leaking or flooding due to poor tolerances and sealing issues.


Q5: How can I ensure the needle is sealing properly?

A: Use a pop-off pressure gauge during assembly to confirm the needle is holding pressure and not leaking through the inlet seat.

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