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Engine whine

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Chuck
(@chuck)
New Member
Joined: 4 months ago
Posts: 1
Topic starter  

I have Jabiru 2200 serial number 988, (last version of solid lifters), 325 hrs. on Zenith 701, built 2002. One of first 701's with Jabiru 2200. I fly about 15 hours per year.

I can hear a whine in the cabin which, started low but is getting louder. We then listened with a stick to ear to places on the engine. Sound at starter low, very little sound forward of starter, medium sound on distributors, loudest sound on edges of alternator spider. (10 pole, 10 amp alternator)
Charges at 14.7 volts.
Replaced regulator anyway, still charges 14.7 volts.
Disconnected one alternator lead, no change in sound.
Pulled spider, coils and magnets look OK.
Checked inside distributors, all looked OK.
I made sure starter Bendix is free to disengage.
I found no steel or other particles in oil filter.
Still have whine.

Any ideas.


   
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Jabiru Support
(@jabiru-support)
Member Admin
Joined: 3 years ago
Posts: 150
 

Hello Chuck,

I suggest removing the alternator stator and checking to see if there has been any rubbing. Sometimes foreign matterial can get stuck to the magnets.  Also try running it without the stator fitted and see if the whine is still there.  

Support.


   
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cffd66
(@cffd66)
New Member
Joined: 4 months ago
Posts: 1
 

Hi Support,

Thanks, your advice was excellent.  However, after removing the alternator, I could see that the head of one of the 4 screws mounting the stator to the spider was worn down. Looking at the fly wheel bolts,  I could see that they had been barely touching the worn stator mounting screw.  The worn screw was loose and could easily be removed with fingers.  Evidently, the screw had been slowly backing out and started contacting the fly wheel bolts (which looked like they were barely affected).  One at a time I removed the stator mounting screws. They had some resistance and  had signs of thread locker.  The worn screw appeared to not have had any thread locker.  I used thread locker on each of screws when I put them back. I did use a new screw for the worn one. I intend to fly it soon.

Thanks, Chuck


   
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Jabiru Support
(@jabiru-support)
Member Admin
Joined: 3 years ago
Posts: 150
 

Glad I could assist.


   
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Jean Remy
(@jean-remy)
New Member
Joined: 3 months ago
Posts: 1
 

Bonjour,

Je possède le moteur serial N° 22A126 Model N° 2200A Date MAN 1996.

Est-il possible d'obtenir une copie du manuel technique de ce moteur?

C'est un très vieux moteur, mais il n'a que 220 h de fonctionnement. il est installé sur un ULM HERMES de 1997 que je restaure.

Je vous remercie d'avance pour votre aide.

Jean-Rémy LIZÉ (France)

En 2003, j'ai assemblé un KIT JABIRU UL 450, Le moteur était le N° 22 A  1821.

Hello,

I have engine serial N° 22 A 126 Model N° 2200A Date MAN 1996.

Is it possible to get a copy of the technical manual for this engine?

It's a very old engine, but it only has 220 hours of operation. it is installed on a 1997 HERMES ULM that I am restoring.

I thank you in advance for your help.

Jean-Rémy LIZE (France)

In 2003, I assembled a JABIRU UL 450 KIT, the engine was No. 22 A 1821.


   
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Jabiru Support
(@jabiru-support)
Member Admin
Joined: 3 years ago
Posts: 150
 

Send an email to info@jabiru.net.au and we will see if we have something helpful for you.


   
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