RE: Nitro Engine Care And Breaking In/Starting Instructions
if your top end is tuned then you may need to lean the bottom a little .. pinch the fuel line at the carb to block fuel flow. it should take 5 seconds to die.. if it takes longer then try leaning..
The fuel flow and needle relationship is simple and when you understand it you can tune better.. The HSN governs the amount of fule allowed through pressure to enter the carb, the LSN governs the amount allowed to spray into the throat of the carb at idle and all the way up to half throttle usually..
Now if the engine is flooding and stalling then what is happeing is called "Load up" ie: the engine loads up with fuel faster than it can burn it off.. So if you lean the LSN you can reduce the loading effect.. Just make sure to tune when engine is at oprating temp.. Most engines will lean themselves automatically as they get hotter or lower in fuel..