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  #1  
Old 09-02-2009, 08:54 PM
Lionclaw's Avatar
Lionclaw Lionclaw is offline
 
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Default 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?
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  #2  
Old 09-03-2009, 01:46 AM
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dhammer dhammer is offline
 
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Location: Keller, TX
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Default 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
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  #3  
Old 09-03-2009, 04:50 AM
mahlon_r mahlon_r is offline
 
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Default

The current hardware is a nut, flat washer and a star washer. Palnuts have not been used in years on Lycoming engines.
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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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  #4  
Old 09-03-2009, 06:19 AM
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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
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  #5  
Old 09-03-2009, 09:38 AM
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Mike S Mike S is online now
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Default

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.
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  #6  
Old 09-04-2009, 07:25 AM
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Lionclaw Lionclaw is offline
 
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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!
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RV-9A - N643AC (built,flying,sold,missed)
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