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  #1  
Old 11-04-18, 09:41 PM
larry bowdish's Avatar
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Thermos Style Fuel Caps

We have a '65 337 and the rubber in our fuel caps no longer provides a seal. Anyone have a set of four they wish to sell?
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  #2  
Old 11-05-18, 01:54 PM
edasmus edasmus is offline
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I'm not familiar with the fuel caps on the 65 model but on my 1973 337G model I was able to replace all the rubber on my fuel plugs from a company in Wisconsin....

Petersen Products Co, LLC
421 Wheeler Avenue
P.O. Box 340
Fredonia, WI 53021-0340

Phone: 262-692-2416

petersenproducts.com

Search "lever type expandable rubber plugs"

The plugs look curiously similar to the factory rubber fuel plugs that were in my C337 but the plugs are not vented.

I measured the size of the fuel port and purchased a few different sizes because I was never happy with the fit of the original Cessna plugs. Off hand I cannot recall the dimension I ended up using but I was able to find a very snug fit that I am very confident in for not much money, even though I ended up with plugs I did not use. It was not worth the effort to return them and the folks there were very helpful.

I simply disassembled the plug that I purchased and used the neoprene rubber that came with the new plug. The rubber was all I was after. They would not sell me just the rubber only the entire cap assembly.

I used the new rubber on the original Cessna vented cap and all is right with the new plug.

Good Luck.....

Ed
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Old 11-06-18, 09:39 AM
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I don't see that these are approved for 337's but is this what you are referring too?


https://monarchcaps.com/
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Last edited by hharney : 11-06-18 at 09:41 AM.
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Old 11-09-18, 09:28 AM
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Kind Of

Didn't find the lever type plugs.

Evidently John Russman mentioned they "Thermos Plug with Lever Style" has an AD or SB and there is a replacement kit sold by someone. Once I learn who I'll post it.

Herb, I believe the Monarch ones are close to what John mentioned. I'll need to find the exact replacements.
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Old 11-09-18, 01:36 PM
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This AD is replacement of caps for venting purposes


http://rgl.faa.gov/Regulatory_and_Gu...2?OpenDocument
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Old 11-09-18, 05:12 PM
Kim Geyer Kim Geyer is offline
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Hey Larry
Cessna has a service kit for this
SK 337-40 or SK 337-41 and it's not cheap
Kim

Last edited by Kim Geyer : 11-09-18 at 05:14 PM.
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Old 11-11-18, 02:50 PM
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Quote:
Originally Posted by Kim Geyer View Post
Hey Larry
Cessna has a service kit for this
SK 337-40 or SK 337-41 and it's not cheap
Kim
http://www.airpowerinc.com/productca...&prodid=362681

https://www.controller.com/parts/air...rch&pst=starts

http://cessnadirect.com/product-sear...uery=SK337-40C
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Last edited by hharney : 11-11-18 at 02:53 PM.
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