I have an nx-76 motor and what I found works best is forget the factory settings for the idle you pinch the fuel line and if it revs up for 3 to 5 seconds that's proper, then the high speed you turn it all the way down till it's seated and then turn two and a half turns out to 2 and 3/4 turns out on the low speed you turn it one out from flush and mine starts up every time I use it number four glow plug which is hot plugand it burns all the fuel up and continues to run if it's warm out or cold out you have to adjust accordingly but mine starts on the first Pole every time