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Tommy Walker
Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207
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 Posted: Tue Mar 02, 2010 4:41 pm Post subject: 912 exhaust nuts |
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I lost one of the 8 nuts on my exhaust pipes.
Can anyone tell me the size of that nut (metric? SAE?) and a source for the nuts?
Thanks,
Tommy Walker in Alabama
N8701T
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Tommy Walker
N25A - Anniston, AL |
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Tue Mar 02, 2010 4:56 pm Post subject: Re: 912 exhaust nuts |
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Hi Tommy,
It is an M8-SW12 locknut. It is a different type of locknut and meant for those high temps. I don't know where locally you might pick one up. Best bet is CPS, Lockwood or leading edge.
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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
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Dick Maddux
Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl
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| Posted: Wed Mar 03, 2010 5:57 am Post subject: 912 exhaust nuts |
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Tommy,
I just replaced my exhaust nuts (and a couple of studs) last week. You are supposed to use new nuts and locktight the studs in the head. Make sure you follow the Rotax SB on the subject as you could end up deforming the flange and have it touch the head if you use too much torque. The SB addresses that. ( I think you use a normal 180 inch lbs to as low as 120 inch lbs in order to keep from touching the head...but check)
IF you decide you don't want to order new nuts, (not recommended) I saved my old ones and can send you a couple if you give me your address.
Dick Maddux
912 Ul
Milton,Fl
[quote][b]
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rampil
Joined: 04 May 2007
Posts: 870
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Tommy Walker
Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207
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| Posted: Wed Mar 03, 2010 1:04 pm Post subject: Re: 912 exhaust nuts |
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I had to order 4 from Lockwood to get the minimum order of $10.00.
Oh well, I will have extra 
Thanks for the help all.
Roger, Lockwood would only search for the part if I gave them the rotax number, so I had to show the lady how to find the number in her price list.
They've had some problems with their website and parts database. I notice they took it off line a year or so ago and haven't put it back up.
Thanks again,
Tommy
| rampil wrote: | Once you replace the lost nut, you may want to drill the angled
corners of the nuts with a #55 drill and safety wire the nuts together
on each exhaust flange. Only now am I really sure the nuts don't
back out!! |
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Tommy Walker
N25A - Anniston, AL |
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