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What causes this? - 6/26/2008 4:09:20 PM   
goirish



Posts: 1353
Joined: 12/7/2005
From: Litchfield, MI, USA
Status: offline 		I have a OS-46 that runs great. The problem is: when I pull the throttle back to idle-the motor slows down, then then after about 5 sec. It slows down more. If I set the idle where I want it when it slows down then it quits. Any suggestions. Like I say the motor runs great, good transition, WOT is good

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RE: What causes this? - 6/26/2008 4:24:59 PM   
MinnFlyer



Posts: 19375
Joined: 4/22/2002
From: Willmar, MN, USA
Status: offline 		That is usually a sign of being too rich on the low end.

At WOT the mixture is good but the needle valve is set slightly lean to compensate for the extra amount of fuel coming in from the low end adjustment, so when you throttle up, the transition is good.

Now you go back to idle, and the mixture slowly richens.

Try adjusting the low end by 1/8-turn increments. You'll have to richen the high end slightly each time too

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RE: What causes this? - 6/26/2008 4:57:52 PM   
goirish



Posts: 1353
Joined: 12/7/2005
From: Litchfield, MI, USA
Status: offline 		I will do that Sir. Thanks for the information. So I am going to lean the lsn and richen the hsn is that correct?

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RE: What causes this? - 6/26/2008 5:07:39 PM   
MinnFlyer



Posts: 19375
Joined: 4/22/2002
From: Willmar, MN, USA
Status: offline 		Correct

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Mike B.
AMA# 42400 www.gettingairborne.com

"Those are my principles. If you don't like them, I have others." - Groucho Marx

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RE: What causes this? - 6/26/2008 8:32:48 PM   
ChuckW


 

Posts: 1788
Joined: 6/15/2006
From: Clovis, CA, USA
Status: offline 		Once you get the low speed set like Minnflyer pointed out, that .46-AX will idle long, long periods of time with no sign of quitting.

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