Can anyone tell me what pressure to set the propane at the carb and how many turns on the mixture just to start out. I just finished tuning up the engine and cleaning everything out. Now the engine just starts to cough a little and then quits. I cannot seem to find close enough settings to get it running so I can fine tune it. The forklift is a clark y69 flat head I know ancient but it has been fun working on it. Thanks Rod