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009 Inlet Tension Pop Off Spring
009 Inlet Tension Pop Off Spring
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009 Inlet Tension Pop Off Spring

Part Number: 009
Online Price: $2.00
009 Inlet Tension Pop-Off Spring for Accurate Carburetor Fuel Flow Regulation
Availability: In Stock.

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Description

009 Inlet Tension Pop-Off Spring for Diaphragm Carburetors


The 009 Inlet Tension Pop-Off Spring is an essential component that regulates the fuel flow rate to the high and low fuel circuits of diaphragm carburetors, particularly during low-speed engine operation. By controlling the pop-off pressure, it ensures precise fuel delivery for smooth idling and consistent throttle response.


It’s important to distinguish pop-off pressure from fuel pressure. Pop-off pressure refers to the resistance created by the spring tension and installation height, which determines when the carburetor’s needle valve opens. It is not the same as fuel pressure, which is generated by the fuel pump and usually measures around 1 PSI. For example, a 10 PSI pop-off pressure rating does not mean the fuel system delivers 10 PSI — it simply means the spring tension requires that force to open the needle valve.


The 009 spring’s design and adjustable installation height allow fine-tuning of pop-off pressure, helping optimize carburetor performance across various small engine applications such as chainsaws, scooters, go-karts, and other two-stroke engines.

FAQ

Q1: What is the purpose of the 009 Inlet Tension Pop-Off Spring?
A1: It regulates the fuel flow by controlling pop-off pressure in diaphragm carburetors, ensuring consistent fuel delivery 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 height, while fuel pressure is generated by the fuel pump and is usually about 1 PSI.


Q3: Will the 009 spring fit all diaphragm carburetors?
A3: The 009 spring is compatible with most diaphragm carburetors used in small 2-stroke engines, but always confirm compatibility with your carburetor model.


Q4: How do I measure and adjust pop-off pressure?
A4: Pop-off pressure is measured using a pressure gauge and adjusted by changing the spring’s installation height or replacing it with a different tension spring.


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

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