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Tillotson High Volume (Double Stack, Alky) Inlet Valve Diaphragm
237-155 Tillotson Inlet Valve Diaphragm
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Tillotson High Volume (Double Stack, Alky) Inlet Valve Diaphragm

Part Number: 237-155
Online Price: $2.71
Tillotson 237-155 High Volume (Double Stack, Alky) Inlet Valve Diaphragm for Carburetors
Availability: In Stock.

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Description

Tillotson 237-155 High Volume (Double Stack, Alky) Inlet Valve Diaphragm


The Tillotson 237-155 High Volume Inlet Valve Diaphragm serves as the essential check valve within your carburetor, ensuring precise fuel flow control for optimal engine performance.


This high-volume double-stack diaphragm features a unique design that separates the fuel pump diaphragm from the fuel inlet/check valve diaphragm. This innovative layout includes an additional plate and specialized components to handle increased fuel flow, making it ideal for applications requiring high volume fuel delivery, such as methanol conversions.


Commonly referred to as the “snake skin” diaphragm due to its distinctive texture, this component is crafted from durable Polytetrafluoroethylene (PTFE, Teflon®) material. The robust PTFE lamination enhances fuel resistance and longevity under demanding racing conditions.

Many carburetor builders convert gas carburetors to run on methanol, which typically involves upgrading to high-volume pump stacks like the 237-155. For a seamless and reliable conversion, we highly recommend purchasing a complete EC Pro Gasket or Rebuild Kit along with this diaphragm to ensure all components work perfectly together.


Compatible Models:
Fits a wide range of Tillotson high volume double-stack carburetors, including HL-304WX, WXA, HL-314F & G, HL-334WXA, HL-339A, HL-341A, HL-342A, HL-348A (B, C, D, E), HL-355A (B, C, D, E), HL-360 (B, C), HL-380 (A, B), HR-181B, HR-184A, HR-190A, HR-191C, HR-191G, HR-196A, and other compatible Tillotson models.


Key Benefits:

  • High volume double-stack design for superior fuel flow
  • Durable PTFE “snake skin” material for extended life and chemical resistance
  • Essential for methanol fuel conversions and high-performance setups
  • Compatible with a broad range of Tillotson carburetor models
  • Recommended to replace alongside a full EC Pro Gasket or Rebuild Kit for best results


Upgrade your carburetor’s fuel delivery system with the Tillotson 237-155 High Volume Double Stack Inlet Valve Diaphragm — engineered for racers and tuners demanding maximum fuel flow and durability.

FAQ

Q1: What is the function of the Tillotson 237-155 inlet valve diaphragm?
A1: The 237-155 diaphragm acts as a check valve within the carburetor, regulating fuel flow and ensuring proper operation of the high volume double stack fuel pump.


Q2: What does “double stack” mean in this context?
A2: “Double stack” refers to the design where the fuel pump diaphragm and the fuel inlet/check valve diaphragm are separate, improving fuel flow and efficiency, especially for high volume applications like methanol use.


Q3: Why is this diaphragm called the “snake skin” diaphragm?
A3: It’s called “snake skin” because of its textured surface made from PTFE (Teflon®), which looks similar to snake skin and provides excellent durability and chemical resistance.


Q4: Is the 237-155 diaphragm compatible with my carburetor model?
A4: This diaphragm fits a wide range of Tillotson high volume double stack carburetors, including HL and HR series models listed in the product description. Check your carburetor model to ensure compatibility.


Q5: Can I use this diaphragm for methanol conversions?
A5: Yes, the 237-155 is specifically designed for high volume fuel delivery needed in methanol conversions. We recommend pairing it with a complete EC Pro Gasket or Rebuild Kit for best results.


Q6: How often should I replace this diaphragm?
A6: Replacement frequency depends on usage and fuel type. For racing or heavy methanol use, inspect regularly and replace as needed to maintain peak performance.

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