Reply To: Not Boat related – Allis Chambers Carb Questions

[amuller]

So it’s not the gland for an adjustable main jet, it’s an access port for cleaning or changing the main jet, or draining the float bowl? This should not be a big problem. You could drill and tap for 1/4″ pipe thread. Or drill and tap for a one-size-larger machine screw and seal with a gasket (if there is a suitable gasket surface machined onto the carb). But I’m a little concerned about the crack you mention. Can you tell how far it extends from the threads?