Hello, so I recently bought a brand new nitro sport it's my first nitro and I think I've messed up the carb I've done the break in process already and I started tuning it alittle and I messed with the lsn and hsn. It won't stay running unless I put my finger on the throttle it will idle but will eventually die.
Try resetting the engine back to the factory settings and go from there. If you ever get into trouble like this, resetting the mixture settings is always the first place to start.
See this link for the Pro .15's factory mixture settings (and more).
"Happiness depends upon ourselves." -Aristotle