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04-05-2018, 03:26 PM
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Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,128
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A Nutty question
I have absolutely no info on the proper nuts to attach my carburetor to my O-360. Elastic stop, all metal stop, drilled hex with safety wire, lock washers. I know this sounds like a dumb question but if there was anything I want properly installed to keep tight it?s the carb.
Thinking about vibration and heat. Received new engine with the Carb in its box and no nuts on the mounting studs.
__________________
Tom Norwood
Classic "Short Tail 6A N822PM
TMX-O360. Phase 1
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04-05-2018, 03:41 PM
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Join Date: May 2009
Location: Reedley, California
Posts: 85
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Thick or thin washer, internal star lock washer, followed with a plain nut. (All aircraft quality of course.) If the part practically NEVER gets removed, I will leave the flat washer off, but that is my idiosyncrasy. If you really want to be anal, a small dab of blue lock-tight wouldn't hurt.
Last edited by dwrichey : 04-05-2018 at 03:45 PM.
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04-05-2018, 04:02 PM
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Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,128
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Thank you dwrichie. If this were my tractor that?s exactly what I would do. Who?d a thought it would be the same for a aircraft. On this plane I question every move I make cause on a plane, it?s just ain't the same. This has been holding me up a little so I really do appreciate your help. 
__________________
Tom Norwood
Classic "Short Tail 6A N822PM
TMX-O360. Phase 1
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04-05-2018, 05:54 PM
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Join Date: Jan 2016
Location: Sugar Land, TX
Posts: 406
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I had the same question regarding the throttle body attachment to my IO-540 on my RV-10. Found the answer in the Lycoming Parts Catalog document PC-215-1A, which is available on Lycoming's website.
For the IO-540, on pages 6-7 and 6-8 Lycoming specs:
WASHER, 5/16 plain
NUT, 5/16-18 plain
LOCKNUT, 5/16 palnut
Not sure if this is the same for the O-360, but you might want to check Lycoming's parts catalog document for your engine.
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Dave Macdonald
RV-10 First Flight April 1, 2020.  Currently in Phase 1
2020 VAF Dues Paid
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04-05-2018, 07:32 PM
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Join Date: Dec 2013
Location: SLC, UT (KBTF)
Posts: 240
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O-360 Parts Catalog
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04-05-2018, 08:27 PM
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Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
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Quote:
Originally Posted by NYTOM
If this were my tractor that?s exactly what I would do. Who?d a thought it would be the same for a aircraft.
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Well....
The Lycoming is similar to either an old tractor motor or a ditch pump, so you should be fine using the same methodology 
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"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q
Donated in 2020
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04-05-2018, 08:44 PM
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Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 1,019
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As the manual mentions you can use the washer, lockwasher and nut. Vic Syracuse states he has seen more than one come loose so he uses AN363 all metal stop nuts with a washer. I followed in his suggestion.
More on his take on this thread http://www.vansairforce.com/communit...d.php?t=148894
__________________
Carlos in Arizona
EAA Chapter 538 www.chapters.eaa.org/eaa538
Wittman Tailwind W8 N53CH (built & sold)
Pazmany PL-1 N2029 (bought & sold)
RV7 - N537TC (reserved & building)
Emp, Wings & Fuse done - working on FWF
"The air is an extremely dangerous, jealous and exacting mistress. Once under the spell most lovers are faithful to the end, which is not always old age." - Winston Churchill
Last edited by pazmanyflyer : 04-05-2018 at 08:47 PM.
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04-06-2018, 03:32 AM
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Join Date: Feb 2005
Location: LSGY
Posts: 3,202
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all metal lock nut 1/4-20?
Hi,
Has anyone been able to find something like an AN363 1/4-20? I can only find -28. Currently using star lock washers, but would prefer a real lock nut if I can find it. There are several places on the engine where the stud is 1/4-20.
Thanks,
Mickey
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04-06-2018, 06:37 AM
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Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 1,019
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Quote:
Originally Posted by rv8ch
Hi,
Has anyone been able to find something like an AN363 1/4-20? I can only find -28. Currently using star lock washers, but would prefer a real lock nut if I can find it. There are several places on the engine where the stud is 1/4-20.
Thanks,
Mickey
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AN363-420 at B&B Aircraft or Wicks.
__________________
Carlos in Arizona
EAA Chapter 538 www.chapters.eaa.org/eaa538
Wittman Tailwind W8 N53CH (built & sold)
Pazmany PL-1 N2029 (bought & sold)
RV7 - N537TC (reserved & building)
Emp, Wings & Fuse done - working on FWF
"The air is an extremely dangerous, jealous and exacting mistress. Once under the spell most lovers are faithful to the end, which is not always old age." - Winston Churchill
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04-06-2018, 07:29 AM
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Join Date: Feb 2005
Location: LSGY
Posts: 3,202
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Thanks!
Quote:
Originally Posted by pazmanyflyer
AN363-420 at B&B Aircraft or Wicks.
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Thanks! B&B website didn't work, ordered just now from Wicks.
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