I am in the process of rebuilding my Carter YF 2100s and came across a port that the new gasket doesn't have provision for. The old gasket has a hole for this port which appears to just seal it as there is no place above for Vacuum or fuel to move. I am thinking that plugging this port should be fine but wanted some suggestions.
The port on the old gasket has a screwdriver pointing to it, and my finger pointing to it on the carb.
Jeremy - that port is the vacuum source for the automatic choke used on the 2101s.
I just checked a couple of 2100s carbs (manual choke), and this passage is not on my carbs.
The gasket to the left is for a 2100s.
The gasket to the right is for a 2101s with automatic choke.
Have no idea why your 2100s has the passage. Since its only function is to provide a vacuum source for the automatic choke, which you should not have, it may be plugged. The easy way to plug the passage is to take a split shot sinker just slightly larger than the passage, and gently press it into the passage.
Jon.
Good carburetion is fuelish hot air The most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes! The Carburetor Shop
