turtletom100 Posted November 20, 2014 Share Posted November 20, 2014 Can anyone help please. I want to know what this scree is and does on the savage xl carb. I can't seem to get the engine running properly have tried tweaking the idle screw but notice that sometimes it don't seem to do much and if you push against this bit (the purple springy lookikg bit) it moves the carb gap Quote Link to comment Share on other sites More sharing options...
J.K Posted November 21, 2014 Share Posted November 21, 2014 The screw on the end of the carb is the low speed needle, usually improving acceleration at low to mid speed. Pushing on the purple bit will indeed change the carb gap as that's the carb itself.... Switch your radios on and make sure there's a 1-2mm gap in the carb. Reset all the needles to factory and then go from there. Don't try to tune your engine until its fully up to temp. Tune the high speed first, then low speed and finally adjust your idle. 2 Quote Link to comment Share on other sites More sharing options...
turtletom100 Posted November 21, 2014 Author Share Posted November 21, 2014 The screw on the end of the carb is the low speed needle, usually improving acceleration at low to mid speed. Pushing on the purple bit will indeed change the carb gap as that's the carb itself.... Switch your radios on and make sure there's a 1-2mm gap in the carb. Reset all the needles to factory and then go from there. Don't try to tune your engine until its fully up to temp. Tune the high speed first, then low speed and finally adjust your idle. Cheers for the reply bit I don't think that is the lsn. That is what a confused me tremendously. The lsn is on the other side just beneath the hsn needges and then to the side of thst is the idle screw. I will get a photo later of the other side if it helps. And if only was as straight forward as flush needle settings to revert to factory it doesn't seem to work. Sometimes when accelerating/braking the carb doesn't revert bask to the idle setting if thst mare sense Quote Link to comment Share on other sites More sharing options...
jordan_bench10 Posted November 21, 2014 Share Posted November 21, 2014 Cheers for the reply bit I don't think that is the lsn. That is what a confused me tremendously. The lsn is on the other side just beneath the hsn needges and then to the side of thst is the idle screw. I will get a photo later of the other side if it helps. And if only was as straight forward as flush needle settings to revert to factory it doesn't seem to work. Sometimes when accelerating/braking the carb doesn't revert bask to the idle setting if thst mare sense oh no tell me you didnt thats what allows fuel into the carb i never ever touch this screw as it takes to much of a hassle to realign lol Quote Link to comment Share on other sites More sharing options...
jordan_bench10 Posted November 21, 2014 Share Posted November 21, 2014 Your lsn is always on the carb barrel as it allows a little pin to regulate how much fuel comes through into the carb and block in between low and mid range throttle until the hsn takes over and it all fully opens up Quote Link to comment Share on other sites More sharing options...
turtletom100 Posted November 21, 2014 Author Share Posted November 21, 2014 oh no tell me you didnt thats what allows fuel into the carb i never ever touch this screw as it takes to much of a hassle to realign lol Great....... fantastic....... brilliant...... lol yea that's being turned in and out a few times lol thought it was as James said above the lsn so flushed it but then had a look around and found the lsn was the one in other side. so is there no factory on this and what is this called lol Quote Link to comment Share on other sites More sharing options...
turtletom100 Posted November 22, 2014 Author Share Posted November 22, 2014 Your lsn is always on the carb barrel as it allows a little pin to regulate how much fuel comes through into the carb and block in between low and mid range throttle until the hsn takes over and it all fully opens up Yea but no matter what I do with lsn, idle, throttle trim I just can't get her started but it's obviously because I have ****** around with that other screw but is there not a setting for it like a factory setting or a way to set it? What is it called I don't mind looking into it. I can tune an engine but now I ****** around its making it near impossible Quote Link to comment Share on other sites More sharing options...
J.K Posted November 22, 2014 Share Posted November 22, 2014 Okay so I think you're actually talking about the mid-range needle (not the one you pictured but actually on the other side of the carb??!) If so then yeah, as Jordan said.....don't touch it - as written in the manual. It needs to be reset to flush but is tough to get it back to how it was from the factory. Quote Link to comment Share on other sites More sharing options...
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