Need some help, Backfires when given gas.

[geezer101]

The line that is now hooked from the pump to the return hose is meant to feed into the forward facing fuel hose barb (this is the inlet for the accelerator enrichment pump) and the other barb connects to the return line. Those monkeys... Without the accelerator enrichment pump you will have a flat spot on take off. But be warned, there might be a reason why it's not connected (your pic does show a new diaphragm gasket poking out around the top of the pump). Reconfigure the hoses so they are correct and see what it does. Use the method I suggested in my earlier post to look for the tell-tale stream of fuel coming out of the enrichment jet. If the pump is functioning and all the diaphragms and gaskets are new, it will shoot a solid jet of fuel straight across the primary throat in the carb.

[FenstermakerWJ]

The line that is now hooked from the pump to the return hose is meant to feed into the forward facing fuel hose barb.

Well, was running for a short time fine but still had a flat spot. Ended up taking it apart and found a diagram for the (vent system??? 3 screws holding on a solenoid of some sort towards the valve cover side) was cracked and the cast piece was in cracked in half. That was allowing fuel to go from the bowl, straight into the vacuum. Prob explains why I was getting a consistent 250 miles per tank. Got a rebuilt crab and hope for the best on it. But yeah that gasket looked like it wasn't replaced, and when the cast piece was cracked when it was rebuilt, they prob didn't bother doing anything and put it back broken.

For the accelerator pump, did you mean the fuel pump hose gets connected to the "forward facing" fuel barb on the right side or the one in the front, to me they are kinda both can be forward facing lol... Ran the same hooked up either way it seemed on the old carb, but slightly better, Sorry, I just don't want to blow anything on the "new" one.

Just wanted to share what I found out.

Thanks.