What part of the throttle does the air screw control on a 2 stroke carb? I'm really close to correct adjustment after a new clampon air filter, and I've played with the air screw before. I just want to know from where to where does it adjust in the range of the throttle. Thanks!

 

Air/fuel screw controls idle and up to about 1/4 throttle,past that its the main jet and slide needles function primarily.Adjustment range normally between 1 1/2 to 2 1/2 turns depending on engine mods,air filter type,etc. OPT

 

That's what I needed Thanks! I know I've read it on here before but I couldn't find it last night and am leaving in a couple hours to ride so I gotta get her to quit that little bit of stumble out of the gate before I leave. Thanks again!

 

Try shutting the air fuel screw down,even down to 1/2 turn if helps while trying out. If doesn't help,may have to raise needle or go a little larger on the jets. OPT

 

I was pretty close as far as the air screw goes, I went up to a 260 instead of a 240 and ended up around 2 turns out on the air screw to get it to where it doesn't studder on take off. I just couldn't remember which part of the throttle range the air screw made a difference in, but it's running like a 400 2-smoke should be now Thanks!

 

i was trying to get my 2004 330 trail boss to idle its been sitting in someones back yard untill i got it got it started but wont idle help

 

Trash in the jets are the most common problem not allowing enough fuel to idle.Might be time to clean the carb or install a new carb kit since it's been sitting up. 1003-0159 - ATV Complete Carb Rebuild Kits Polaris Magnum 330, Trail Boss 330 | ATV Parts | MFG Supply