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?

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

I don't see that these are approved for 337's but is this what you are referring too?


https://monarchcaps.com/

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.

This AD is replacement of caps for venting purposes


http://rgl.faa.gov/Regulatory_and_Gu...2?OpenDocument

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

i have one of this style on our bird.... just one though. it is on our auxiliary tank.

Thermos Style Fuel Caps
 

Larry I have the replacement kit from Cessna to change from old style to the vented caps, like on single engine Cessnas. I have the blue print that goes with the install kit. The only parts I don't have are three of the humped fuel cap covers, but you get them from Don Nieson for about $30-40 each (used). This kits are fairly easy to install and only needs a logbook entry-no Form 337 required. If interested e-mail me at bstory@pa.rr.com or call 814-673-6863c
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