Matronics Email Lists :: View topic - Rotax 582 Start Current

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Rotax 582 Start Current

Matronics Email Lists Forum Index -> Kitfox-List

View previous topic :: View next topic

Author Message

Guy Buchanan

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

Posted: Thu Feb 08, 2007 11:04 am Post subject: Rotax 582 Start Current

The short question is: What is the approximate start current for a Rotax 582?



Why do I ask? Because today I fried the shunt on my 30A ammeter. This 

shunt operates in line between the battery and starter.



I've noticed lately that starting has been slower and I attributed it 

to lower battery capacity. Today I checked the voltage at 13.1V, then 

tried starting. I got three very slow turn-overs followed by a click, 

then nothing. It turns out the click was the shunt separating. I've 

got probably 100 starts on this system over the last year. I did a 

resistance check of the starter across the "big" wires and got only 

0.3 ohms. Is it possible the starter is shorted? How can I tell if 

the starter is bad? Do I dare simply attach the battery to the 

starter directly to see if it works? I could also simply by-pass the 

shunt to see if it works, then I could use the start switch. I'm 

concerned, however, that if the starter is shorted I could blow the 

battery. Is that a possibility?



Thanks,

Guy Buchanan

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

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

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

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Thu Feb 08, 2007 11:17 am Post subject: Rotax 582 Start Current

I would guess alot more than 30 amps .

And when cold  even more as your gearbox oil is thicker.

---

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

_________________
Realtime Kitfox movies to separate the internet chatter from the truth
http://www.youtube.com/user/kitfoxflyer
Hundreds of Kitfox Movies
Most viewed Kitfox on youtube
Most popular on youtube
Highest rated on youtube

Tom Jones

Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA

Posted: Thu Feb 08, 2007 3:15 pm Post subject: Re: Rotax 582 Start Current

Hi Guy, I have the instillation instructions for the Rotax two stroke electric starter.  Believe it or not, it says initial draw is 200 amps, decreasing to approx 50 amps at 500 RPM.  They emphasize using a good flexible multistrand #4 wire.  Due to the high draw I suspect.  These instructions do not include installing a link or fuse in the solinoid to starter wire.



Tom Jones

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

torgemor(at)online.no
Guest

Posted: Thu Feb 08, 2007 4:21 pm Post subject: Rotax 582 Start Current

Guy,



The shunt should not be used between the starter and the battery, the  

shunt must be installed between your main fuse (20 Amp?) and the bus bar.



In this way your ampere meter only show the flow between normal users  

radio, light etc. and charging. If you actually is charging the battery a  

little, you'll have a positive reading, but drawing to much give a  

negative reading due too high load for your generator -so time to switch  

off some extra load.  

Torgeir.



On Thu, 08 Feb 2007 20:04:04 +0100, Guy Buchanan <bnn(at)nethere.com> wrote:



 	  Quote: 	
		   



 The short question is: What is the approximate start current for a Rotax  

 582?



 Why do I ask? Because today I fried the shunt on my 30A ammeter. This  

 shunt operates in line between the battery and starter.



 I've noticed lately that starting has been slower and I attributed it to  

 lower battery capacity. Today I checked the voltage at 13.1V, then tried  

 starting. I got three very slow turn-overs followed by a click, then  

 nothing. It turns out the click was the shunt separating. I've got  

 probably 100 starts on this system over the last year. I did a  

 resistance check of the starter across the "big" wires and got only 0.3  

 ohms. Is it possible the starter is shorted? How can I tell if the  

 starter is bad? Do I dare simply attach the battery to the starter  

 directly to see if it works? I could also simply by-pass the shunt to  

 see if it works, then I could use the start switch. I'm concerned,  

 however, that if the starter is shorted I could blow the battery. Is  

 that a possibility?



 Thanks,

 Guy Buchanan

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




	


-- 

Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

Guy Buchanan

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

Posted: Thu Feb 08, 2007 6:22 pm Post subject: Rotax 582 Start Current

At 03:15 PM 2/8/2007, you wrote:

 	  Quote: 	
		  Believe it or not, it says initial draw is 200 amps, decreasing to 

approx 50 amps at 500 RPM.


	


Tom,

         Thanks. That's just what I was looking for. So I guess the 

30 amp shunt's not going to work, eh? I wonder how it worked this 

long! I'm sure glad it didn't decide to fail in the desert! Now it's 

back to the drawing board for the ammeter installation.



Guy Buchanan

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



Do not archive

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

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

Display posts from previous:

	Matronics Email Lists Forum Index -> Kitfox-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum