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09-02-2009, 08:54 PM
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Join Date: Sep 2007
Location: Albuquerque, NM
Posts: 659
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Carb Attach Hardware?
My engine has 5/16-18 carb studs. The parts manual shows the attach hardware to be plain flat washers, plain nuts, and palnuts. What's a palnut? Should I use something else instead?
__________________
Andy Compton, PhD EE
RV-10 - #41414 (building)
RV-9A - N643AC (built,flying,sold,missed)
My blood and sweat, the Wifey's tears 
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09-03-2009, 01:46 AM
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Join Date: Nov 2007
Location: Keller, TX
Posts: 151
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Palnut
Standard hardware used as a jam nut to lock down a plain nut. Nothing wrong with using them for this application.
Decent picture at -
http://shop.comdir.co.uk/Products.as...rWebTemplate=C |
09-03-2009, 04:50 AM
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Join Date: Jan 2005
Posts: 1,024
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The current hardware is a nut, flat washer and a star washer. Palnuts have not been used in years on Lycoming engines.
Good Luck,
Mahlon
?The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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09-03-2009, 06:19 AM
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Join Date: Jun 2008
Location: Charlottesville, VA
Posts: 801
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In lieu of a star lock washer, if the stud is long enough (as it is on my -8), a MS35338 split helical lock washer can also be used. The star washers must be discarded and a new one used if the nut is ever removed. The split helical washers can be used again. YMMV
__________________
Jim Shannon
RV-8 N52VV
Charlottesville, VA
AFS 4500 EFIS & 3400 EFIS/EM
G430W - SL30 - G327 - G696 - G240
TT DigiFlight II VSVG w/pitch autotrim
VP-X Pro
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09-03-2009, 09:38 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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My engine came with an363-518 nuts holding the FI servo.
They are hard to find, I found out.
GAHCO shows them in their catalog.
Star washer setup ala Mahlon's post is easy to do, and works.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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09-04-2009, 07:25 AM
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Join Date: Sep 2007
Location: Albuquerque, NM
Posts: 659
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I've got a big bag of star washers from spruce, so I'll probably go that route. Thanks for the help!
__________________
Andy Compton, PhD EE
RV-10 - #41414 (building)
RV-9A - N643AC (built,flying,sold,missed)
My blood and sweat, the Wifey's tears
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