I have a Allis Chalmers ACC30 PS forklift, it will not start unless you spray starting fluid in the carb, even after it has been running and has reached operating temp if you shut it off it will not start unless you spray starting fluid in the carb, then it starts up no problem. I have checked the following with acceptable results, plugs, points, dist. cap & rotor, coil, timing, engine compression & vacuum The unit runs fine with no problems after initial startup. Any ideas or suggestions would be greatly appreciated.