> even with, and parallel to the Bowl Gasket
Looking at my carbs and recalling what they look like and looking at videos of identical carbs, I'm guessing that my carbs don't follow that rule. It looks like what is normally the top sits about 3/16 inch below the top of the installed Gasket. It would take a good bit of bending to get it to obey this rule. But, if I can't stop the flooding, I might try anyway.
I think flooding because the needle valve does not shut seems like a good candidate. Here is a photo with red arrows pointing to where the fuel trickles out when the motor is running.
When it turns over trying to start, or runs for a couple of seconds, fuel leaks out of the two brass tubes denoted by arrow (what are they called?) When I managed to get it running for several seconds, it also began to trickle out of the larger hole pointed to by the lower arrow. The red rectangle drawn at the top shows that my float was tilted around the axis of its motion. I since fixed it, but did not try in the motor.
I squirt carb cleaner into the location of the arrows in the next photo:
If I squirt carb cleaner at the red arrow it comes out of the big hole in the previous photo. If I squirt it at the white arrow, it comes out of the brass tubes shown in the previous photo. This is consistent maybe with what I saw. If the bowl is overfiling, it will first pour in at the white arrow, and later at the red arrow. And when it was running, I saw fuel first trickle out of the brass tubes and later out of the big hole. (If I understand what i have read, then that is a vent hole to make sure the surface of the reservoir in the bowl is at atmospheric pressure.)
I may have messed up the top carb already just during the rebuild since those cylinders seemed to be working well before, but now none seem to be working well. The top carb seemed to be leaking, although not flooding. I see a bit of a gap at the gasket:
I see that gap no matter how tight or loose the screws are. Maybe it's not enough to cause a leak.
I did readjust the float on the lower carb. It now looks like this (with rectangles drawn over float):
The last picture was taken after I readjusted the twist around the axis, but *before* readjusted the level seen from the side. You can see that the front is tilted up above the edge of the bowl.
I don't see how any of that would affect flooding, anyway; The pin should still shut the flow when the float rises.
One last thing, on the lower carb there is a click every time i lift the float with my finger. It doesn't feel at all the float is catching or its motion is hindered. But there is no click like this on the upper carb. I could try swapping the pieces to see what happens.
I'm thinking of rechecking the floats one last time and reinstalling and seeing what happens.
