Do you know of any specific approvals to replace fuel system components (including carbs/injectors and pumps) on a certified aircraft with ethanol-compatible ones?
No, mainly because I'm not an A&P. I don't pretend to knowledge I don't have. I don't know which lines have a TSO approval, PMA approval, or if other documentation is needed.
This link shows replacement fuel lines for various Cessna models- for the purposes of this conversation, I'll assume they are authorized unless someone with some credentials explains otherwise. If I had a certified plane, I'd ask my A&P:
General Aviation Fuel Hose Assemblies Aircraft Spruce's Supplier is an FAA approved hose assembly fabricator of products with a certified hose shop for fabricating to spec.
www.aircraftspruce.com
Going to the Stratoflex site, it seems those lines are made of PTFE, which
is ethanol compatible:
I wouldn't be surprised if there are ethanol compatible replacement seals, diaphragms, and other parts for certified aircraft.
Except OP is talking about a 182. If we had some eggs we could make some ham and eggs, if we had some ham.
and then we discussed a C152.
@Cap'n Jack I believe you hail from the petrochem industry if I remember?
No, but I work closely with those that do. For example, I worked with several refineries to streamline their SARA analysis (saturates, asphaltenes, resins, aromatics) in the crude oil. Working with them, I updated an analysis that took 4 hours to run to about 45 minutes, and they can do further analysis on the various components, if desired. Their previous method didn't permit recovery of the sample fractions. I also worked with a refiner for analysis of some anti-knock compounds. There's some other work I'm doing that I can't discuss now.
everything except small engine equipment, such as chainsaws, mowers, leaf blowers, and the like.
I've no problem with E10, even after 6 to 9 months in storage because I add Stabil so I can store the mower/snow blower without draining the fuel. These small engines start on the second pull when I first run them. Without the additive, automotive fuel doesn't keep well at all. That reminds me...time to check that the snow blower starts so I have time to get it fixed before the rush, if needed. I've seen snow here in mid-October deep enough to dig.
coupled with the storage problems makes me keep it far away from my aircraft.
You are wise, unless you fly it often! Auto gas has more unsaturated hydrocarbons that polymerize into varnish that clogs things. The ethanol likely helps that process along.