challenger 1800 dies when i give it gas

[taylorpinder29]

I have just rebuilt one of the engines on my boat (top end). I have cleaned the carbs inside and out. Once i give it gas it dies. it idles like a champ. the only way that i can get to motor running is to move the throtle up and down to build the RPM up to about 3000 and it runs fine. I have also replaced all the parts on the rave valve. i was having the same problem with this motor before i rebuilt it. ANY INPUT WOULD BE GREATLY APPRECIATED

 

[Dr Honda]

Your carbs should have an accelerator pump. Sounds like it's not pumping. The diaphragm could be bad, or the lines could be plugged.