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Replace Needle?

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Thu Jan 31, 2008 9:31 pm Post subject: Replace Needle?

All 582 drivers, past and present,

         I'm doing my 150 hour check and the book says I should 

change the needles and needle jets. Should I? Or does this date back 

to the days before the needle O-rings? Do these wear out from 

vibration? Anything else I should change out at 150 hours?



Thanks,

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

Fox5flyer
Guest

Posted: Fri Feb 01, 2008 4:50 am Post subject: Replace Needle?

Guy, vibration does cause wear to the needles, needle jets, and slides, but 

it takes A LOT more than 150 hours to cause it, IMO.  I would save that sort 

of thing for when you do the major overhaul.

Deke Morisse

Mikado Michigan

S5/Subaru/CAP 355+ TT

"The aim of an argument or discussion should not be victory, but progress."

- Joseph Joubert

 	  Quote: 	
		  

 All 582 drivers, past and present,

         I'm doing my 150 hour check and the book says I should change the 

 needles and needle jets. Should I? Or does this date back to the days 

 before the needle O-rings? Do these wear out from vibration? Anything else 

 I should change out at 150 hours?



 Thanks,

 Guy Buchanan

 San Diego, CA

 K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.

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chenoweth(at)gwi.net
Guest

Posted: Fri Feb 01, 2008 5:40 am Post subject: Replace Needle?

Guy,

On the subject of 582 carburetor maintenance - I bought and installed the 

carb "rebuild" kit at about 200 hours (this past summer).  O-rings and stuff 

and two viton tipped float chamber valves.  Then all hell broke loose.  At 

idle, gas was pouring from the vents and anywhere below 5000 things ran very 

poorly.  There were some suggestions that the engine was vibrating too much 

causing the problem but several local two-stroke people and a video clip to 

Lockwood got me past that explanation.  Over a period of days I eventually 

replaced the new float valves with my old ones - problem solved.  It turned 

out that Bing or Rotax had increased the stiffness of the little springs in 

the valves and that caused them to not seat as well.  From what I've learned 

recently the change was related to a 912 problem not a 582 problem and that 

now they've settled on valves with springs intermediate in stiffness to old 

and new.  Meanwhile I'm sticking with my old ones.

Bill

IV-1200

---

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dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Feb 01, 2008 5:04 pm Post subject: Re: Replace Needle?

 	  Quote: 	
		  All 582 drivers, past and present, 

I'm doing my 150 hour check and the book says I should 

change the needles and needle jets. Should I? Or does this date back 

to the days before the needle O-rings? Do these wear out from 

vibration? Anything else I should change out at 150 hours? 

	




Guy, I would do nothing but check everything  including  carb sockets and change gear box oil if you have not in the last 150 hours. 

change fuels lines every year or 2. 



My  current 582 is was installed june 2006 and is pushing 400 hours and current spark plugs almost 150 hours , change exhaust gaskets twice and NOTHING ELSE. 



Older engines might need cranks seals  if over 5 years old.

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_________________
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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Fri Feb 01, 2008 9:40 pm Post subject: Replace Needle?

At 05:04 PM 2/1/2008, you wrote:

 	  Quote: 	
		  Guy, I would do nothing but check everything  including  carb 

sockets and change gear box oil if you have not in the last 150 hours.

change fuels lines every year or 2.



My  current 582 is was installed june 2006 and is pushing 400 hours 

and current spark plugs almost 150 hours , change exhaust gaskets 

twice and NOTHING ELSE.



Older engines might need cranks seals  if over 5 years old.


	


Thanks Dave,

         It looks like I've done all of that and more. I'm surprised 

you can go so long between de-carbs, since I've done it every 50 

hours and each time it seemed like I scraped off a good amount of 

stuff. My plugs also seem to gunk pretty bad. I'm running 100LL, 

Decalin, and Pennzoil in the oil injection. My rear banjo fitting 

leaks so I have a lot of oil in the intake when I start. I wonder how 

much that contributes. Any ideas?



Thanks,



Guy

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sat Feb 02, 2008 9:10 am Post subject: Re: Replace Needle?

 	  Quote: 	
		  My rear banjo fitting 

leaks so I have a lot of oil in the intake when I start. I wonder how 

much that contributes. Any ideas? 

	




If you are getting oil in to your port then replace th Banjo,,,  there is a check valve in there that will allow this to happen when it becomes faulty

about 27$ for one.



 	  Quote: 	
		  I'm surprised 

you can go so long between de-carbs, since I've done it every 50 

hours and each time it seemed like I scraped off a good amount of 

stuff. My plugs also seem to gunk pretty bad. I'm running 100LL, 

Decalin, and Pennzoil in the oil injection. 	




I run regular gas and oil injection . AV gas is not a good thing for 582s and I not sure if using Decalin helps stop crud , lead etc from depositing.



Decarboning at 50 hours would only be advisable if you are running pre mix very rich like 30 to 1 maybe. My oil injection keeps mine  nice.  I don't think Pennzoil or my XPS mineral oil changes it all at but avgas certaily can help add to the gunk.

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