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JohnE
Joined: 31 Mar 2012
Posts: 11
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 Posted: Mon Jun 10, 2013 12:40 pm Post subject: Rotax 912 exhaust pipe repair |
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The co-pilot side rear exhaust pipe cracked on me this weekend. I called a few shops to have it repaired (overhauled), but it seems none of them work on the smaller diameter piping. Rotax is 1 1/4 inch?
The lead time for a new replacement from the factory (Diamond) is about 10 weeks. I looked thru the Rotax parts manual and saw their are 2 different pipes and some kits. Mine is stainless steel. How are 912 owners fabricating their exhausts? What shops will do this.
thanks for any info.
John
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dgraham7(at)TWCNY.RR.COM
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| Posted: Mon Jun 10, 2013 1:08 pm Post subject: Rotax 912 exhaust pipe repair |
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Try Travis Kobush. Kobushweldingandmachining.com
Regards,
Damien
N48TK
Sent from my iPad
On Jun 10, 2013, at 4:40 PM, "JohnE" <j_l_walsh(at)yahoo.com> wrote:
| Quote: |
The co-pilot side rear exhaust pipe cracked on me this weekend. I called a few shops to have it repaired (overhauled), but it seems none of them work on the smaller diameter piping. Rotax is 1 1/4 inch?
The lead time for a new replacement from the factory (Diamond) is about 10 weeks. I looked thru the Rotax parts manual and saw their are 2 different pipes and some kits. Mine is stainless steel. How are 912 owners fabricating their exhausts? What shops will do this.
thanks for any info.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402426#402426
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KeysFox
Joined: 05 Jan 2009
Posts: 137
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| Posted: Mon Jun 10, 2013 1:41 pm Post subject: Rotax 912 exhaust pipe repair |
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I just had Precision Welding in Sebring weld new ends (that got into the
heads) onto my existing exhaust pipes for a Kitfox IV with early 912.
Lockwood apparently has used them for this specific type of job. And the
lady welder said she had done "millions" of these end replacements. The
ends were Rotax parts from Lockwood. Not sure about fabrication of new
exhaust systems.
BJ Kitfox IV 912
| Quote: |
<dgraham7(at)twcny.rr.com>
Try Travis Kobush. Kobushweldingandmachining.com
Regards,
Damien
N48TK
Sent from my iPad
On Jun 10, 2013, at 4:40 PM, "JohnE" <j_l_walsh(at)yahoo.com> wrote:
>
>
> The co-pilot side rear exhaust pipe cracked on me this weekend. I
> called a few shops to have it repaired (overhauled), but it seems none
> of them work on the smaller diameter piping. Rotax is 1 1/4 inch?
>
> The lead time for a new replacement from the factory (Diamond) is about
> 10 weeks. I looked thru the Rotax parts manual and saw their are 2
> different pipes and some kits. Mine is stainless steel. How are 912
> owners fabricating their exhausts? What shops will do this.
>
> thanks for any info.
>
> John
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=402426#402426
>
>
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B Jones
N154K
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BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
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| Posted: Mon Jun 10, 2013 2:21 pm Post subject: Rotax 912 exhaust pipe repair |
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Keep LQQKing John:
All you need is a Welding Shop that can do Thin Wall Stainless Steel.
AND ask them to put a PATCH over the crack. Do not let them just weld the crack. Weld the crack and Patch for strength.
Barry
On Mon, Jun 10, 2013 at 4:40 PM, JohnE <j_l_walsh(at)yahoo.com (j_l_walsh(at)yahoo.com)> wrote:
[quote]--> RotaxEngines-List message posted by: "JohnE" <j_l_walsh(at)yahoo.com (j_l_walsh(at)yahoo.com)>
The co-pilot side rear exhaust pipe cracked on me this weekend. I called a few shops to have it repaired (overhauled), but it seems none of them work on the smaller diameter piping. Rotax is 1 1/4 inch?
The lead time for a new replacement from the factory (Diamond) is about 10 weeks. I looked thru the Rotax parts manual and saw their are 2 different pipes and some kits. Mine is stainless steel. How are 912 owners fabricating their exhausts? What shops will do this.
thanks for any info.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402426#402426
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JohnE
Joined: 31 Mar 2012
Posts: 11
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| Posted: Mon Jun 10, 2013 3:12 pm Post subject: Re: Rotax 912 exhaust pipe repair |
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Thanks for the info. The crack in this case cut the pipe into 2 pieces. It does look like another section of pipe could be put over it and then welded if thats how they would do it.
[quote="BARRY CHECK 6"]Keep LQQKing John:
All you need is a Welding Shop that can do Thin Wall Stainless Steel.
AND ask them to put a PATCH over the crack. �Do not let them just weld the crack. �Weld the crack and Patch for strength.
Barry
On Mon, Jun 10, 2013 at 4:40 PM, JohnE <j_l_walsh> wrote:
| Quote: | --> RotaxEngines-List message posted by: "JohnE" <j_l_walsh>
The co-pilot side rear exhaust pipe cracked on me this weekend. �I called a few shops to have it repaired (overhauled), but it seems none of them work on the smaller diameter piping. �Rotax is 1 1/4 inch?
The lead time for a new replacement from the factory (Diamond) is about 10 weeks. �I looked thru the Rotax parts manual and saw their are 2 different pipes and some kits. �Mine is stainless steel. �How are 912 owners fabricating their exhausts? �What shops will do this.
thanks for any info.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402426#402426
===========
-List" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b] |
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Tue Jun 11, 2013 4:17 am Post subject: Re: Rotax 912 exhaust pipe repair |
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John,
After you get the tube repaired, make sure you do a pneumatic synchronization of the carbs. Unbalanced carbs add a lot of unnecessary vibration to the whole powerplant. Our DA20-A1 has 1100+ hours on its second engine (F3) and no cracks. I check the balance during every annual inspection.
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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JohnE
Joined: 31 Mar 2012
Posts: 11
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| Posted: Thu Jun 13, 2013 8:10 am Post subject: Re: Rotax 912 exhaust pipe repair |
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| Thom Riddle wrote: | John,
After you get the tube repaired, make sure you do a pneumatic synchronization of the carbs. Unbalanced carbs add a lot of unnecessary vibration to the whole powerplant. Our DA20-A1 has 1100+ hours on its second engine (F3) and no cracks. I check the balance during every annual inspection. |
Hi Thom,
Thanks for the advice. I'm using the downtime to send my carbs in for overhaul and then will do a pneumatic synch when I get them back. My engine seems pretty smooth, but in aviation, smooth is relative. 
Good to hear from another DA20-A1 owner. There are not too many left in the US.
-John
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Thu Jun 13, 2013 8:16 am Post subject: Re: Rotax 912 exhaust pipe repair |
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...There are not too many left in the US....
Quite true. Many DA20-A1 owners sold them to buyers in Europe where their excellent fuel economy and Rotax engines are considered virtues.
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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