A Nutty question

[NYTOM]

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.

[dwrichey]

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.

[NYTOM]

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.

[DRMA]

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.

[koupster]

https://www.lycoming.com/sites/defau...20PC-306-1.pdf
Pages 57-58

Cheers, David
RV-6A A&P

[mike newall]

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.

Well....

The Lycoming is similar to either an old tractor motor or a ditch pump, so you should be fine using the same methodology

[pazmanyflyer]

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

[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

[pazmanyflyer]

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

AN363-420 at B&B Aircraft or Wicks.

[rv8ch]

Originally Posted by pazmanyflyer

AN363-420 at B&B Aircraft or Wicks.

Thanks! B&B website didn't work, ordered just now from Wicks.