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Tillotson HR Spacer Washer
78A-245 Tillotson HR Spacer Washer
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Tillotson HR Spacer Washer

Part Number: 78A-245
Online Price: $0.99
78A-245 Tillotson HR Spacer Washer – High-Speed Mixture Screw OEM Washer
Availability: In Stock.

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Description

78A-245 Tillotson HR Spacer Washer – High-Speed Mixture Screw Washer (OEM)


The 78A-245 Tillotson HR Spacer Washer is a genuine OEM part specifically designed for use with the high-speed mixture screw on all Tillotson HR carburetors. This brass washer fits between the fuel adjustment needle spring and the O-ring, acting as a critical spacer that prevents the spring from damaging or deforming the O-ring over time.


Key Features:

  • OEM-quality brass washer for Tillotson HR carburetors
  • Fits only the high-speed needle (not for use on low-speed circuits or other models)
  • Prevents spring from crushing or cutting the O-ring
  • Maintains a proper seal in the high-speed fuel circuit
  • Helps preserve fuel adjustment integrity over time


Specifications:

  • Outside Diameter: 0.318"
  • Inside Diameter: 0.1875"
  • Thickness: 0.035"
  • Material: Precision-machined brass
  • Part Number: 78A-245


Compatibility:

  • Fits All Tillotson HR Series Carburetors
    Do not use this washer on any non-HR carburetor models or on the low-speed needle.
    Always confirm your carburetor model and consult its parts diagram before ordering.

FAQ

What is the Tillotson 78A-245 HR Spacer Washer used for?

This washer sits between the fuel adjustment spring and the O-ring on the high-speed mixture screw of Tillotson HR carburetors. It prevents the spring from crushing or damaging the O-ring during adjustment.


Does the 78A-245 fit other Tillotson models?

No, this part is designed specifically for the high-speed needle of HR series Tillotson carburetors only. It is not compatible with HL, HW, HB, or other models.


What are the dimensions of the washer?

  • Outside Diameter: 0.318"
  • Inside Diameter: 0.1875"
  • Thickness: 0.035"

Is this an OEM Tillotson part?

Yes, the 78A-245 is a genuine OEM Tillotson washer, ensuring a precise fit and reliable function.


Why is this washer important?

Without the washer, the spring can cut into the O-ring over time, leading to poor fuel mixture control or leakage. The washer ensures longevity and a tight seal for proper carburetor operation.

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