I recently rebuilt a 75 2150. There is fuel dumping out of a small port on the bottom of the bowl, in between the mixture screw and power valve. This port leads to the accelerator pump. I cannot find anything online about this issue. My assumption is that I have the float set to high, but like I said. Nothing online about this hole. The diaphragm is fine so please don t even go there. I m NOT talking about the hole on accelerator pump cover. This is underneath next to the vacuum port. HELP!
Something's missing here. No carb has an unanswered, open port at the bottom of the bowl. Either there was a plug, or a fitting of some sort there. And is now gone.
Is this a Holley? A Rochester? A Carter? A Weber? Yes, your float may be set too high but if you have raw gas spewing out of anywhere, there has to be a breach in a gasket or something - like the accelerator pump diaphragm.
It's time to pull it apart and have a good look at everything. Did you get a gauge to set the float level in the rebuild kit? You should have.