Welch Plugs
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Welch Plug
STE525-329
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Tecumseh 631027
9/16" diameter

Welch Plug
STE615-674
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Tecumseh 630748
Walbro 88-55
7/16" diameter

Welch Plug
STE615-690
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Tecubseh 630746
Walbro 88-54 / 88-28 / 88-171
5/16" diameter