I have been in contact with Moeller this is their response:
I am not seeing anything pulling with the model number referenced. Could you please verify? More than likely you are seeing fuel permeation, fuel molecules penetrate the plastic creating a fuel smell. These are not vapors or fumes and there is no risk of ignition. You can always confirm you have no leak by performing a 3-psi pressure check and applying soapy water to all of your fittings. Unfortunately, if it is fuel permeation, there is no fix. I've attached our list of fuel tanks should you wish to browse, if you already have, we do not offer any other fuel tank at this moment. I sent picture of label on fuel tank and
I am waiting on a reply.
I think something has changed with C & O
I have them bookmarked and it’s not the same old website.
Thanks, I am going to keep searching.
NO FISH NO FRIEND !!!!!