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Tillotson HS .345 Welch Plug
179-59 Welch Plus (HS)
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Tillotson HS .345 Welch Plug

Part Number: 179-59
Online Price: $1.29
179-59 Tillotson HS .345" Welch Plug (Soft Plug)
Availability: In Stock.

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Description

179-59 Tillotson HS .345" Welch Plug – OE Soft Plug for Low & High Fuel Circuits


The 179-59 Tillotson Welch Plug (also known as a soft plug) is designed to seal internal fuel passages in HS-series Tillotson carburetors. Most commonly, it covers the low-side fuel circuit well, though in some carburetor configurations, it may also seal high-speed circuits or even the main nozzle channel.


From the factory, this plug is typically sealed with epoxy resin. However, when rebuilding or servicing your carburetor, epoxy is usually not required if the plug is installed properly using the correct tool.


Key Features:

  • OE replacement for .345" Welch Plug in Tillotson HS carburetors
  • Seals internal low-side, high-side, or nozzle fuel circuit wells
  • Compatible with the Tillotson 753 Welch Plug Installation Punch
  • Made from soft aluminum for easy expansion and secure sealing
  • No epoxy necessary when properly installed
  • Critical component for rebuilds, tuning, and leak prevention


Installation Tip:

Use the 753 Welch Plug Punch to properly expand the plug into the carburetor body. This creates a reliable, pressure-tight seal and avoids damage to delicate carb internals. Avoid hammering or makeshift tools, which can distort the plug or the fuel circuit.


Compatibility:

  • 179-59 OE Tillotson .345" Welch Plug
  • Fits most Tillotson HS-series carburetors
    (Always verify your model’s plug size before ordering.)


Specifications:

  • Diameter: .345"
  • Material: Soft aluminum
  • Application: Body channel plug for HS-series Tillotson carburetors

FAQ

Q1: What is the function of the 179-59 Tillotson Welch Plug?

A: The 179-59 is a soft plug that seals internal fuel passages in Tillotson HS-series carburetors. It most commonly covers the low-side fuel well, but may also seal high-speed circuits or nozzle channels, depending on the carb model.


Q2: Is epoxy required when installing this plug?

A: While factory-installed plugs may be epoxied, epoxy is not necessary for rebuilds if the plug is properly seated using the Tillotson 753 punch tool.


Q3: How do I install the 179-59 Welch Plug?

A: Use the 753 Welch Plug Installation Punch to expand the soft aluminum plug inside the fuel well. This ensures a tight seal and prevents leaks. Avoid using improvised tools, which can damage the carburetor body or fuel circuit.


Q4: Which carburetors is this plug compatible with?

A: The 179-59 plug fits most Tillotson HS-series carburetors. Always verify your model's requirements and plug dimensions before ordering.


Q5: What are the dimensions of this Welch plug?

A:

  • Diameter: .345"
  • Material: Soft aluminum
  • Application: Fuel circuit sealing in HS-series Tillotson carbs



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