Chris RC and Shoestring Racer:

Before you guys get too bent out of shape (there's already a bad thread going on in this forum...one's enough......chuckle), when I read your posts, you don't seem to be disagreeing, just miscommunicating.

Chris said:

"Instead of raising the idle, you would want to lean the LSN for a better idle. I NEVER move the idle up or down just because it idles too high or stalls. You tune the LSN then counteract with the idle."

Shoestring said:

"the LSN should be adjusted for what it is designed and intended to do - to fine tune the transition from idle to 1/4 - ½ throttle where the HSN then takes over. The LSN is not there to adjust or modify idle speed."

To me, you are both saying the same thing...."make sure the LSN is adjusted properly first, then adjust the idle set screw if required"

However, there is one issue.

Chris said:

"Every engine I have owned was super rich from the factory, some of them wouldn't even start so I had to lean the LSN to get them to start."

while Shoestring said:

"The HSN should be adjusted before the LSN. Fuel enters the carb through the High Speed Needle first and it directly affects the amount of fuel that goes on to the LSN."

I agree with Chris on that one as I don't think the normal range of the HSN will have any affect on the very limiting setting of the LSN. However, this is one where a lot of people disagree, so it's not worth getting into wihtout proof. I tried to do some experimenting where I check fuel flow with a gravity feed set-up to see if the HSN would acutally affect the LSN (at a typical normal setting), but without suction from the engine, the LSN wouldn't drip fuel consistently so I gave up the experiment. BUt basically, I do as he says....first adjust the LSN so the engine won't keep stalling.

So to be fair to Shoestring, his advice below also works fine:

"My suggestion to a newb to leave the idle high is that it will help prevent stalling out so that they can get the 2 needles sorted out with less stalling"