RE: S30 Tornado factory carb settings
Yes if the LSN is too lean it could be affecting your ability to prime. Don't get too caught up in how many turns your needles are at. If you suspect your tuning is off, just run both needles back out like where they were when you were breaking it in. The HSN should be about even or just beyond the sleave it's in. Same goes for the LSN. This will usually get the engine to at least fire up very rich. It may not want to stay running, but you can start leaning the HSN in 1/8 or 1 hour increments until it will idle. Now you can run it and lean your HSN so it runs strong. Once it seems to be running good at high speed you can check the LSN. At idle, pinch the fuel line. If it takes longer than 3 seconds to stall its too rich, turn in on the LSN. If it stalls in less than 3 seconds, it's too lean, back it out.