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006 Inlet Tension Pop Off Spring
006 Inlet Tension / Pop-Off Spring
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006 Inlet Tension Pop Off Spring

Part Number: 006
Online Price: $2.00
006 Inlet Tension Pop-Off Spring for Accurate Carburetor Tuning
Availability: In Stock.

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Description

006 Inlet Tension Pop-Off Spring for Diaphragm Carburetors


The 006 Inlet Tension Pop-Off Spring is a critical component in diaphragm-style carburetors, designed to precisely control fuel flow to both the high and low side circuits—particularly during low-speed engine operation. By influencing pop-off pressure, this spring helps regulate when the carburetor’s inlet needle valve opens, ensuring optimal fuel delivery and consistent engine performance.


It’s important to understand that pop-off pressure is not the same as fuel pressure. While your fuel pump typically delivers around 1 PSI, pop-off pressure refers to the amount of pressure required to overcome the spring tension and unseat the needle valve. A 10 PSI pop-off reading does not indicate the fuel system is generating 10 PSI—it simply reflects the spring's resistance level.


Pop-off pressure is determined by two factors:

  • The specific tension rating of the spring (like the 006)
  • The installation height of the spring within the carburetor

Whether you're fine-tuning a small two-stroke engine or rebuilding a performance carburetor, the 006 spring provides a consistent and reliable baseline for low-speed fuel metering.


Key Features:

  • Controls pop-off pressure for accurate fuel delivery
  • Ideal for low-speed tuning in diaphragm carburetors
  • Compatible with most 2-stroke and small engine applications
  • Helps improve idle stability and throttle response
  • Manufactured for consistency and durability

FAQ

Q1: What does the 006 Inlet Tension Pop-Off Spring do?
A1: It regulates pop-off pressure in diaphragm carburetors, controlling when the needle valve opens and managing fuel flow at low engine speeds.


Q2: Is pop-off pressure the same as fuel pressure?
A2: No. Pop-off pressure refers to the pressure required to open the needle valve, based on spring tension. Fuel pressure is generated by the pump and is typically around 1 PSI.


Q3: What engines or carburetors is the 006 spring compatible with?
A3: The 006 spring is suitable for most small 2-stroke engines using diaphragm-style carburetors, including models from Tillotson, Walbro, and similar brands.


Q4: How do I adjust pop-off pressure with the 006 spring?
A4: Pop-off pressure can be adjusted by changing the spring’s installation height or using a different spring rate. A pop-off tester is recommended for accurate tuning.


Q5: When should I use the 006 pop-off spring?
A5: The 006 spring is ideal for applications where precise fuel control at low RPM is critical, such as in chainsaws, go-karts, or other performance-tuned small engines.

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