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Tillotson 233-721P HW Needle & Seat Kit
223-721P Tillotson Needle & Seat Kit for HW-27A
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Tillotson 233-721P HW Needle & Seat Kit

Part Number: 233-721P
Online Price: $19.45
233-721P Tillotson Needle & Seat Kit for HW-27A & HW-33A Carburetors
Availability: In Stock.

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Description

233-721P Tillotson Needle & Seat Kit – For HW-27A & HW-33A Carburetors


Ensure precise fuel control and protect your engine with the 233-721P Tillotson Needle & Seat Kit, engineered specifically for Tillotson HW-27A and HW-33A carburetors. This genuine OEM kit is critical for maintaining proper fuel metering and preventing tuning issues that can impact engine reliability and performance.


Key Features:

  • Designed for HW-27A & HW-33A Carburetors – Tailored fit for these specific Tillotson models ensures accurate fuel delivery and consistent performance.
  • Precision-Machined Components – Includes a high-quality needle and seat to maintain proper fuel pressure and flow.
  • Critical Tuning Control – Correct seat sizing is essential:
    • Too large = rich fuel condition, leading to poor performance.
    • Too small = lean condition, risking engine damage or failure.
  • OEM Tillotson Quality – Manufactured to exact specifications for reliability and longevity.
  • Installation Note – Always verify your carburetor model before ordering to avoid tuning issues.


Recommended Use:

For optimal tuning and engine safety, only use the 233-721P kit with HW-27A and HW-33A carburetors. Do not substitute with off-size aftermarket kits.

FAQ

Q1: Which carburetors are compatible with the 233-721P Needle & Seat Kit?
A: The 233-721P Needle & Seat Kit is designed specifically for Tillotson HW-27A and HW-33A carburetors. Please verify your carburetor model before ordering to ensure compatibility.


Q2: Why is the size of the needle and seat so important?
A: The needle and seat diameter is critical for proper fuel metering.

  • Too large of a seat will result in a rich fuel condition, causing poor engine performance.
  • Too small of a seat will lead to a lean condition, risking potential engine damage or failure.


Q3: Can I use this kit on carburetors other than HW-27A or HW-33A?
A: For the best performance, it is highly recommended to use the 233-721P Needle & Seat Kit only with HW-27A and HW-33A carburetors. Using it in other carburetors may cause improper tuning and performance issues.


Q4: What happens if I don’t replace the needle and seat?
A: A worn or damaged needle and seat can lead to poor fuel regulation, causing engine running issues, such as flooding, lean conditions, or inconsistent power output. Replacing the needle and seat kit helps ensure reliable engine performance and avoids potential damage.


Q5: How can I install the 233-721P Needle & Seat Kit?
A: Installing the 233-721P kit requires basic carburetor knowledge. Ensure you remove the old needle and seat assembly carefully and install the new one following the manufacturer’s instructions. If unsure, refer to your carburetor manual or consult a professional mechanic.

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