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Idle jet size on the 447

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DAquaNut(at)aol.com
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Posted: Wed Jan 17, 2007 6:12 pm Post subject: Idle jet size on the 447

List,

  

  I am having trouble with my firefly loading up at idle for more than  about 10 seconds. Just wondering if going down on the idle jet size would cure  the problem. I think this is a common problem on the 447 , and wondered if any  one has cured it.    There have been a few times I would go to "  clear" it and it would bog to the point of dying almost!   Anyone had  this problem and cured it?  Not much in the archieves.

  

       Ed  Diebel         Firefly  062    ( In Houston) (Where it has been colder than  normal)

  [quote][b]

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Malcolmbru(at)AOL.com
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Posted: Wed Jan 17, 2007 8:14 pm Post subject: Idle jet size on the 447

carb icing is a possibility read the eht and cht if they seam low for  the condition you may have carb ice.  this would give you a rich  condition  and bog easily IT isn't the 447  but the one card supplying  so much fuel and air  that makes it easier to ice up then the 503 with two  carbes  

  I flew in ice conditions in my firestar several times even formed ice  on the wings and tail bogged the motor down so lo I landed with throttle  full forward and stalled when I let off the gas I weighed the plane back at the  hanger it was 592 LB  Malcolm Michigan

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beauford(at)tampabay.rr.c
Guest

Posted: Thu Jan 18, 2007 6:30 am Post subject: Idle jet size on the 447

Ed...

 I doubt you would have to change the idle jet size from the  original...  The symptom you describe sounds like the way mine behaves when  it has crud in the idle jet...  Have you checked to see if it is  clean...?   It only takes a tiny amount of fuzz in that jet to make it  do exactly what you are describing...  Mine is stable at idle as long as  the idle jet is clean. 

  

 Worth what ye paid fer it...

 Beauford

 FF# 076

 Grounded... BRS shipped off for repacking 

 [quote]   ---

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DAquaNut(at)aol.com
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Posted: Thu Jan 18, 2007 4:56 pm Post subject: Idle jet size on the 447

In a message dated 1/18/2007 8:31:41 A.M. Central Standard Time,  beauford(at)tampabay.rr.com writes:

  	  Quote: 	
		  Have you    checked to see if it is clean...?   It only takes a tiny amount of    fuzz in that jet to make it do exactly what you are describing...  Mine    is stable at idle as long as the idle jet is clean. 	


 

         Beauford,

  

        I have had the problem since new. If I  let it idle  for more than about 5 seconds it seems to load up. I thought  it was getting too much gas, but if I knew for certain,I would not be needing  help. I will check to make sure everything is clean. I need to replace all my  fuel lines anyway!  If the weather ever warms back up!!

  

                    Ed

  [quote][b]

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Steven Green

Joined: 05 Feb 2006
Posts: 118

Posted: Thu Jan 18, 2007 5:16 pm Post subject: Idle jet size on the 447

Ed,

  

 I changed the idle jets from winter  to summer.  In the summer the OEM supplied jets caused a rough idle (too  rich).  I installed the next size smaller idle jets during the summer and  it made a nice difference.  BTW my engine was a 582.

  

 Steven Green

 [quote]    

          I have had the problem since new. If    I let it idle  for more than about 5 seconds it seems to load up. I    thought it was getting too much gas, but if I knew for certain,I would not be    needing help. I will check to make sure everything is clean. I need to replace    all my fuel lines anyway!  If the weather ever warms back up!!

    

                        Ed

 	  Quote: 	
		  



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_________________
Steven Green

olendorf

Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA

Posted: Thu Jan 18, 2007 8:36 pm Post subject: Re: Idle jet size on the 447

"Idle jet on 447"



When I first installed my 447 it ran rich at idle. So rich I couldn't even use the choke at all without the engine stopping.  I changed from a 45 idle jet to a 40.  It is much better.  Been that way now for 180 hours.

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_________________
Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
http://sites.google.com/site/kolbfirestar/

tkrolfe(at)usadatanet.net
Guest

Posted: Sat Jan 20, 2007 7:51 am Post subject: Idle jet size on the 447

olendorf wrote:



 	  Quote: 	
		  



"Idle jet on 447"



When I first installed my 447 it ran rich at idle. So rich I couldn't even use the choke at all without the engine stopping.  I changed from a 45 idle jet to a 40.  It is much better.  Been that way now for 180 hours.



--------

Scott Olendorf 

Original Firestar, Rotax 447, Powerfin prop

Schenectady, NY

http://KolbFirestar.googlepages.co

  




	


I too had to change my idle jet to a 40 on my 447 when first installing 

it on my FireFly back in "95".  Been that way since.  Thought I was the 

only one until last year when a friend acquired a FireFly and had to do 

the same to get it to idle properly.



Terry -  FireFly  #95

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