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Fuel cap o-rings


Flying C Farms

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Tip, if you've got a couple of the "O" rings, I'll buy 2. Let me know the total and I'll send you payment with self addressed stamped envelope to use for sending the rings back to me. You can just post here or send me an email. reh3335@yahoo.com. Thanks.

 

Kurt, I'm not familiar with Krytox grease. Would a light coating of Mobile 1 synthetic grease work?

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Not for any length of time. Any other grease will soften and dissolve in gasoline. Krytox 240AC is what I use but any of the thicker ones will work. There's always a bunch of sellers on ebay. I replaced my seals in the Tuff-jugs too since those O-rings were going bad and the outer plastic filler neck needs to seal well but also slide against the inner part. I haven't had to re-grease it even a year later.

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I run E10 almost exclusively. Can't say I've seen any problems except the gas cap o-rings. It's also worth changing the fuel filter every 100hrs instead of 200hrs I think. Could have just been age, but anyway I replaced them with VITON style rings:

Product ID: ov-75-222

Product Name: Fluorocarbon 222 Size O-ring

Quantity: 2

Unit Price: $0.64

 

from http://www.superiorseals.com/

 

I want to make sure we are talking about the same thing. The part listed above, I believe, is for the CTLS. I am looking for o-rings for the CTSW. They don't carry the same gas cap o-ring.

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  • 1 year later...

Hello everybody,

 

Could anyone give me the exact dimensions for O-rings please?

I'm looking for 222 size and seems to be too small (37.70mm ID) compared with the real dimensions of fuel cap o-ring seat (cca.53mm). Can anyone confirm that is 222, with 37.70mm ID? Also, what is the original size for the small O-ring under the axle,under the nut?

 

Thanks,

Alec

 

PS

I think will be better if admin will move this topic to maint section.

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Hello everybody,

 

Could anyone give me the exact dimensions for O-rings please?

I'm looking for 222 size and seems to be too small (37.70mm ID) compared with the real dimensions of fuel cap o-ring seat (cca.53mm). Can anyone confirm that is 222, with 37.70mm ID? Also, what is the original size for the small O-ring under the axle,under the nut?

 

Thanks,

Alec

 

PS

I think will be better if admin will move this topic to maint section.

The LS has a larger flush SPRL cap.  I think this is the oring kit for it.

http://www.aircraftspruce.eu/newton-sprl-cap-o-ring-kit.htm

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Thanks for your answers.

Sorry, I've forgot: it is a CTLS 2008 with SPRL 65mm.

I've tryed some different orings with 53x3/3.5mm, but the fuel continue to drip. With the correct/original size in hand, I can find the replacement faster locally , and cheap (btw, the transport from US is 40usd - the lowest one, and about 4 weeks freight time).

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Not for any length of time. Any other grease will soften and dissolve in gasoline. Krytox 240AC is what I use but any of the thicker ones will work. There's always a bunch of sellers on ebay. I replaced my seals in the Tuff-jugs too since those O-rings were going bad and the outer plastic filler neck needs to seal well but also slide against the inner part. I haven't had to re-grease it even a year later.

 

Really, $205 for 2oz of that grease?!?  http://www.skygeek.com/dupont-lubricants-grease-240ac-2-oz-tube-240ac2oz.html?utm_source=googlebase&utm_medium=shoppingengine&utm_content=dupont-lubricants-grease-240ac-2-oz-tube-240ac2oz&utm_campaign=froogle&gclid=CKaIvPfWj70CFUNo7Aodsg8Abw

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240AC goes from 800 to 270 20C to 38C http://www2.dupont.com/Lubricants/en_US/assets/downloads/H-58519-7_Krytox_Aero_Grade_Oils_and_Greases.pdf

205 is sort of OK at 160 cSt but 204 or thinner is like a thin oil at 40C. http://www2.dupont.com/Krytox/zh_CN/assets/downloads/H58510_1.pdf

For comparison 160cSt is about the viscosity of 40W motor oil at 40C

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