[wtm442]

Are both acc pumps the standard 30 cc variety? It looks like that in the picture. The thickness of the pump housing should be the same on both acc pumps. If a 50 cc pump was used, it needs different hardware as compared to the 30 cc pump.

But you might have 50 cc Reo pumps on both bowls. The pictures are not clear enough. Check the thickness of both housings and make sure they are the same.

The pump cam looks like its brown. The brown and yellow cam (if my memory is correct) are only used on a 50 cc pump and should not be used on a 30 cc pump.

Is that a white pump cam (stamped 218) on the primary side?

The Holley way to adjust is to open the throttle all the way (WOT). Push the pump arm lever down and then adjust the pump override spring to obtain .015" clearance between the pump arm and lever.

I like to take 2 wrenches on the pump override spring, and back off the nut until there is clearance (free play) between screw head and the pump arm. Then tighten until the free play is removed. Then go to WOT and check to see if you have clearance (at least .015 ").

Last but not least. Its been a long time since I looked at an acc pump cam from below like your picture. Is that brown cam installed correctly? It looks like it might be ass backwards? Can you install a pump cam incorrectly? Its been a long time since I changed one.

Good Luck - if the above does not help, send me a PM with your tel # and we can talk about it.

You might want to set the date on your camera.