I have a 1993 Caravelle 1750 w/ a 3 litre HO engine. I rebuilt the Holley double barrell carburator last year & had the boat running perfect up until the middle of this summer. The engine runs perfect under approx 3k rpm. Any additional throttle given causes it to loose all power & will generally stall. Once this occurs, you can immediately restart the engine & it will again run fine until it gets near 3k rpm. <br />I have replaced the fuel filter and the fuel pump, however, this did not help.<br />I read in my service manual that all OMC engines are equipped w/ an "anti-siphon" device that is located somewhere between the fuel tank outlet and the fuel pump inlet. The book does not show a picture of it but it says it can malfuntion and cause the same problems I am having. <br />The problem is that I can not locate this device. I have followed the fuel line from the plastic fuel tank under the back bench seat all the way to the fuel pump. I need to know where this might be and what it would look like.<br />I appreciate any ideas on what may be causing this problem.
