I have a rather bafling problem, my engine (200hp 2003 carb) is not firing on the top two cylinders with the wiring harnes in place. When I disconnect the wiring harness it runs fine. I have replaced the wiring harness, but the same problem occurs. Is there any wires in the harness that would affect thetop two cylinders and cause this problem? I have disconnected the tack, replaced the key switch and then replaced the entire wiring harness. I conected the new wiring harness to another boat with the same engine and it works fine. Someone please help me find the solution!!!
