Re: Carburator $ Fuel PROBLEM HELP!!!!

Posted by HH56 On 2011/6/14 20:41:25

Pump output pressure normally depends on the diaphragm spring in pump unless the diaphragm is under too much tension. If the spring is the same one, then that doesn't leave much in the pump. Any chance when you rebuilt the pump the diaphragm was not flexed to the full travel limits when you screwed the halves together and is under tension. Usually there is very little flow and possibly even a damaged diaphragm along with more pressure when that happens.