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Tillotson High Volume(Double Stack, Alky) Fuel Inlet/Check Valve Gasket
16B-253 Tillotson .020" Alky (Methanol) Inlet Valve Gasket
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Tillotson High Volume(Double Stack, Alky) Fuel Inlet/Check Valve Gasket

Part Number: 16B-253
Online Price: $0.89
16B-253 Tillotson High Volume Fuel Inlet/Check Valve Gasket
Availability: In Stock.

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Description

16B-253 Tillotson High Volume Fuel Inlet/Check Valve Gasket – .020" Thick


The 16B-253 Fuel Inlet/Check Valve Gasket is a precision-fit gasket designed for use in Tillotson High Volume (Double Stack / Alky) fuel pump stacks. This gasket is installed directly beneath the check valve diaphragm on all high-volume Tillotson fuel pump plates — including racing applications using methanol (alky).


Installing this gasket above the diaphragm can lead to tuning inconsistencies, reduced fuel flow, and even premature wear or leakage in the pump stack. Proper placement is essential for maintaining the correct check valve function and consistent carburetor performance under load.


Key Features:

  • OEM Tillotson Fuel Inlet/Check Valve Gasket
  • Designed for High Volume / Double Stack / Alky pump plates
  • Correct installation position: below the check valve diaphragm
  • Prevents tuning issues and internal leaks when installed properly
  • Ideal for use in high-RPM, methanol-fueled race engines
  • Reusable for limited rebuilds — but best replaced every 3–5 races


Pro Tip:

Apply a light coat of mineral oil (such as Marvel Mystery Oil) to both sides of the gasket during installation. This prevents sticking, reduces the chance of tearing, and makes future servicing easier.


Specifications:

  • Thickness: .020"
  • Material: Premium fiber gasket material
  • Fitment: All Tillotson High Volume (Double Stack / Alky) fuel pump plates
  • Placement: Directly below the check valve diaphragm


Compatibility:

  • Works with 801 High Volume Pump Stack
  • Compatible with the following plate kits:
    • 67-38 (Fuel Inlet Plate)
    • 198-305 (Middle Diaphragm Plate)
    • 91A-303 (Main Diaphragm Cover)
  • Fits carburetors used in methanol racing engines, including HL and HR-series models like:
    HL-348A/B/C, HL-334WXA, HL-360C, HR-181B, HR-196A, and more.


Recommended Maintenance:

  • Replace every 3–5 races or during each major carburetor rebuild
  • Inspect for damage or deformation when servicing the fuel stack
  • Always install beneath the diaphragm — never on top

FAQ

Q1: What does the 16B-253 gasket do in a Tillotson carburetor?

A: The 16B-253 is a fuel inlet/check valve gasket used in high volume (double stack / alky) Tillotson pump stacks. It forms a critical seal under the check valve diaphragm, ensuring proper fuel delivery and preventing leaks or tuning issues.


Q2: Where should the 16B-253 gasket be installed?

A: This gasket must be installed below the check valve diaphragm. Installing it above the diaphragm can cause irregular fuel pulses, performance loss, and premature wear in your fuel pump stack.


Q3: Can the 16B-253 gasket be reused?

A: Yes, it can be reused in limited rebuilds if it's undamaged. However, for optimal performance and reliability, replace it every 3–5 races or with every new diaphragm.


Q4: What carburetors does the 16B-253 fit?

A: It fits all Tillotson High Volume (Double Stack / Alky) pump plates, including those on HL-348, HL-334WXA, HL-360C, HR-181B, HR-196A, and others built for methanol racing.


Q5: What is the thickness of the 16B-253 gasket?

A: This gasket is .020 inches thick, made from a high-quality fiber composite designed to handle racing fuel and high-RPM vibration.

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