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008 Inlet Tension Pop Off Spring
008 Inlet Tension / Pop-Off Spring
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008 Inlet Tension Pop Off Spring

Part Number: 008
Online Price: $2.00
008 Inlet Tension Pop-Off Spring for Tillotson & Intimidator Carburetors
Availability: In Stock.

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Description

008 Inlet Tension Pop-Off Spring for Diaphragm Carburetors (Methanol-Optimized)


The 008 Inlet Tension Pop-Off Spring is a precision-engineered component designed to control the rate at which fuel flows into the high and low side circuits of diaphragm carburetors—especially during low-speed engine operation. This spring plays a critical role in regulating pop-off pressure, directly affecting fuel metering, throttle response, and idle stability.


It’s important to note that pop-off pressure is not the same as fuel pressure. While a typical fuel pump delivers around 1 PSI to the carburetor, pop-off pressure refers to the force required to unseat the inlet needle valve—determined by both the spring's tension and its installation height. For example, a 10 PSI pop-off pressure does not imply the fuel system generates 10 PSI; rather, it reflects the pressure needed to overcome the spring and open the needle valve.


Why Choose the 008 Spring?

The 008 spring is one of our most popular and trusted inlet tension springs, especially for performance and racing applications. It is commonly used in our blueprinted methanol Tillotson and Intimidator diaphragm carburetors, where consistent and accurate fuel delivery is essential for high-performance operation.

We also include the 008 spring in our P8-MRK Pro Rebuild Kits, specifically designed for double-stack methanol Tillotson and Intimidator carburetors, making it a proven choice for builders and tuners working with alcohol-fueled small engines.


Key Features:

  • Controls pop-off pressure for precise fuel metering
  • Ideal for low-speed and idle circuit tuning
  • Compatible with methanol-fueled diaphragm carburetors
  • Used in P8-MRK Pro rebuild kits for Tillotson and Intimidator models
  • Trusted in high-performance and racing applications


Recommended Applications:

  • Methanol Tillotson & Intimidator diaphragm carburetors
  • 2-stroke and small engine racing setups
  • Carburetor rebuilds and tuning kits
  • Go-karts, chainsaws, and other performance engines

FAQ

Q1: What does the 008 Inlet Tension Pop-Off Spring do?
A1: It regulates pop-off pressure in diaphragm carburetors, controlling how and when fuel enters the engine—especially important for low-speed and idle circuits.


Q2: Is the 008 spring compatible with all diaphragm carburetors?
A2: The 008 spring is primarily used in methanol-fueled Tillotson and Intimidator diaphragm carburetors, especially in double-stack configurations. Always confirm your carb model before installation.


Q3: What is pop-off pressure and how is it related to this spring?
A3: Pop-off pressure is the pressure required to open the carburetor’s needle valve. The 008 spring sets this pressure based on its tension and install height, and does not reflect the actual fuel pressure from the pump.


Q4: Why is the 008 spring included in the P8-MRK Pro rebuild kits?
A4: Because it delivers reliable, race-proven fuel control in methanol setups, the 008 spring is standard in P8-MRK Pro rebuild kits for high-performance Tillotson and Intimidator carburetors.


Q5: What kind of performance can I expect with the 008 spring?
A5: You can expect consistent fuel delivery, smoother idle, and better throttle response—especially under the high demands of racing and methanol-fueled engines.

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