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011 Inlet Tension Pop Off Spring
011 Inlet Tension / Pop-Off Spring
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011 Inlet Tension Pop Off Spring

Part Number: 011
Online Price: $2.00
011 Inlet Tension Pop-Off Spring for Precise Carburetor Fuel Flow Control
Availability: In Stock.

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Description

011 Inlet Tension Pop-Off Spring for Diaphragm Carburetors


The 011 Inlet Tension Pop-Off Spring is a vital component that regulates the fuel flow rate to the high and low side circuits of a diaphragm carburetor, especially during low-speed engine operation. By controlling the pop-off pressure, it helps maintain smooth and efficient fuel delivery for optimal engine performance.


It's important to understand that pop-off pressure is not the same as fuel pressure. The pop-off pressure refers to the force needed to open the needle valve, determined by the spring tension and its installation height—not the fuel pump pressure. Most fuel pumps deliver approximately 1 PSI, so a pop-off pressure rating of 10 PSI does not mean the fuel system produces 10 PSI. Instead, it represents the spring tension resistance the fuel must overcome to open the valve.


This spring is specifically designed to ensure precise fuel metering and consistent carburetor performance, making it an essential upgrade for small engines, two-stroke motors, and other carbureted applications requiring accurate low-speed fuel control.

FAQ

Q1: What does the 011 Inlet Tension Pop-Off Spring do?
A1: It controls the fuel flow rate by regulating the pop-off pressure in diaphragm carburetors, especially important for smooth operation at low engine speeds.

Q2: Is pop-off pressure the same as fuel pressure?
A2: No. Pop-off pressure depends on spring tension and installation, while fuel pressure is generated by the fuel pump, typically around 1 PSI.

Q3: How do I know if the 011 pop-off spring fits my carburetor?
A3: The 011 spring fits most diaphragm carburetors used in small 2-stroke engines like chainsaws, go-karts, and scooters. Verify fitment with your carburetor model.

Q4: How can I adjust the pop-off pressure using this spring?
A4: Pop-off pressure is adjusted by changing the spring install height or replacing the spring with one of a different tension rating, like the 011.

Q5: Why is pop-off pressure important?
A5: Proper pop-off pressure ensures the carburetor needle valve opens correctly, balancing fuel delivery for optimal engine performance and preventing flooding or starvation.

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