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Rotax Voltage Regulator

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Guy Buchanan

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

Posted: Sat Aug 18, 2007 1:44 pm Post subject: Rotax Voltage Regulator

All,

         It looks like my Rotax 582 three phase voltage regulator's 

dying. (It will occasionally go over voltage. I can re-set it and get 

it to work, but it's happening more often now.)

         Does anyone have a recommended replacement? I've mounted it 

in the engine compartment to minimize electrical noise in the cockpit 

and I suspect things are a little hot for the stock Rotax unit. Has 

anyone tried any of the Harley replacements? Any after-market units? 

Or should I just increase the cooling to the Rotax unit?



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.

369PL

Joined: 08 Sep 2006
Posts: 20

Posted: Sun Aug 19, 2007 4:33 am Post subject: Re: Rotax Voltage Regulator

I posted the same question a few months ago. Some one sugested the keywest reggulator. It provides a more constant voltage on my aircraft. I also think it reduced my radio noise. But mine is on the inside of the firewall. I don't know how the heat will affect it.

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Mnflyer

Joined: 15 May 2006
Posts: 78

Posted: Sun Aug 19, 2007 4:59 am Post subject: Re: Rotax Voltage Regulator

The Keywest is probaly the best regulator available. I replaced the original Rotax one with a Keywest  and it provided steady even voltage both were mounted on the engine side of the firewall didn't notice any noise reduction in the radio.

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_________________
GB
MNFlyer
Flying a HKS Kitfox III

msm_9949(at)yahoo.com
Guest

Posted: Sun Aug 19, 2007 5:22 am Post subject: Rotax Voltage Regulator

Gary:



The Key West solid-state regulator available from LEAF and many other sources (John & Deb?) is inexpensive and works great. I replaced the stock regulator a few years ago with the KW and it has operated flawlessly. There's a good Mike Strattman article on California Power System's website that describes all the alternatives and how they work.



Marco Menezes

KF II 582-90 N99KX



Guy Buchanan <bnn(at)nethere.com> wrote:[quote] --> Kitfox-List message posted by: Guy Buchanan 



All,

         It looks like my Rotax 582 three phase voltage regulator's 

dying. (It will occasionally go over voltage. I can re-set it and get 

it to work, but it's happening more often now.)

         Does anyone have a recommended replacement? I've mounted it 

in the engine compartment to minimize electrical   [quote][b]

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sun Aug 19, 2007 6:54 am Post subject: Rotax Voltage Regulator

If this is a problem that has  been coming on slowly then I expect there is a problem with a ground in  your system somewhere.  First step is to make sure all the ground  connections between the voltage regulator,battery and engine to the frame of the  plane are nice and shiny clean.  These solid state units (regardless of  brand name) are designed to operate many years without attention.  When  they quit they normally don't come back.

  

 There is an operating envelope  for these regulators in terms of operating temperature and your problems may be  temperature related.  you can try mounting a piece of 1" scat hose inside  the cowl to direct air from the front of the cowl to the  regulator.

  

 I have had serious EMI (Electro  Magnetic Interference) in the past with my 582.  The cause was in the spark  plugs.  The 582 requires resistor plugs AND resistor caps.  because of  an engine problem all my plugs shorted the resistor in the plugs I could hear  the tower but the tower couldn't copy me at all even though my signal was  strength 5.  I was operating on batteries.

  

  

[img]cid:626171014(at)19082007-0D1B[/img]  

 Noel Loveys, RPP, AME intern

 Campbellton, Newfoundland, 

 Canada

 Kitfox Mod III-A, 582, B box, Ivo IFA

 Aerocet 1100s

 noelloveys(at)yahoo.ca (noelloveys(at)yahoo.ca)

 

 



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Noel Loveys
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Aerocet 1100 Floats

Mark.Napier(at)sciatl.com
Guest

Posted: Mon Aug 20, 2007 6:55 am Post subject: Rotax Voltage Regulator

The Key West regulator works well for me.



I had a problem with my system and thought the regulator was the

problem.  Swapped it out with no improvement.  Turned out the grounding

was not right.



The original one should work fine; $30 if you want it.



Cheers,



Mark Napier



Time: 02:44:23 PM PST US

From: Guy Buchanan <bnn(at)nethere.com>

Subject: Rotax Voltage Regulator

All,

         It looks like my Rotax 582 three phase voltage regulator's 

dying. (It will occasionally go over voltage. I can re-set it and get 

it to work, but it's happening more often now.)

         Does anyone have a recommended replacement? I've mounted it 

in the engine compartment to minimize electrical noise in the cockpit 

and I suspect things are a little hot for the stock Rotax unit. Has 

anyone tried any of the Harley replacements? Any after-market units? 

Or should I just increase the cooling to the Rotax unit?



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

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

Posted: Mon Aug 20, 2007 7:28 pm Post subject: Rotax Voltage Regulator

At 07:55 AM 8/20/2007, you wrote:

 	  Quote: 	
		  I had a problem with my system and thought the regulator was the

problem.  Swapped it out with no improvement.  Turned out the grounding

was not right.


	


Mark,

         What was the problem with the grounding? How did your 

problem manifest itself?

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.

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