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Idle adjust on 582

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Tc9008(at)aol.com
Guest

Posted: Sat Feb 25, 2006 4:54 am Post subject: Idle adjust on 582

What screw do I use to adjust the idle only? It is at 2200  and wants  to 

float on landing. What could cause it to increase?

Travis

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bmwebb(at)cox.net
Guest

Posted: Sat Feb 25, 2006 5:24 am Post subject: Idle adjust on 582

Hi Travis,

My first thought would be that a cable is binding, causing the carb to stay

open slightly. It doesn't need much. What is it idling at now? I can't seem

to get much below 1950, but anything below 2300 is really rough.



My Rotax guy at the field said I should use a feeler gauge to check the

slide height when fully closed. I'm not sure there is a spec, just make them

match.



The best way I think is the get a mercury carb balance tool that are used on

motorcycles. They're available for about $40: check Ebay. I am partial to

the Motion Pro, but there are others. Maybe beg and borrow from your local

motorcycle shop? They'll hook up to the ports on the side of the carb, and

measure the suction of each throat, comparatively. Then you just adjust the

cable at the top of the carb to even them up. Very simple. Best is that they

compensate for any irregularities in the carb.



Use a piece of 1/4 inch fuel line over the cable ends at the carb. My Rotax

ones were shot, CPS gave me the idea to use fuel line with zip-ties instead.

Works very well, and keeps water out.



One more thing to check: take a real good look at the cable ends on both

sides. Maybe even remove the top of the carbs, pull out the sliders, and

inspect the cable seat. Any foreign matter there will raise the slide

slightly. Make sure they're put together per Rotax spec. It can be done

wrong. Also check the seating at whatever 2 into 1 cable device you're

using. Make sure the barrel ends are seated properly. Case in point, I

discovered that the barrel on my oil injection line twists slightly on the

arm at the motor. It doesn't seat like it should. But it only happens at

full throttle. It idle, it twists back like it should be.



I had a piece of debris fall into the throttle cam on my Bandit once. Ran

great, until you went to idle, where it sat at 2500 rpm. Pulled it apart,

and it was holding the cable away from the groove, effectively shortening

the cable, and raising the idle. Removed it, and everything went back to

normal. 



Hope this helps,

Bradley

KF2 N1836

Middle GA



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Tc9008(at)aol.com
Guest

Posted: Wed Mar 01, 2006 6:55 pm Post subject: Idle adjust on 582

Thanks for the help. Got it down to 1980, much better

Travis

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