REFLECTOR: Fuel Cap O-Ring Size

[Gary T. Ciampa]

All,

I was hoping to get some advice on the appropriate O-ring for my fuel 
cap. I have a non-vented compression fuel cap and  need to replace the 
old O-ring.(Wicks Aircarft link to fuel cap model: 
http://www.wicksaircraft.com/catalog/product_detail.php/pid=4881~subid=303/index.html) 


The closest I could find is a MS83461-1-325, black, but the -325 seems 
to be a bit smaller than the one that needs replacing.

The old o-ring is an orange/brown color, the dimensions match the -325 
but the when compressed in the fuel cap, the orange/brown one seems to 
expand more and provides a good seal for the cap. I have a crack in the 
original o-ring, hence the reason for replacing.

Information on the o-ring, ID, OD and thickness, 1-1/2", 1-7/8", 3/16"

Thanks.....I'm confused......