Looking for a photo...

of a spark plug that shows the proper coloration/burn signature (mixture) running 92 ethanol.

My visual memories are images of a coffee brown plug from the days of leaded fuel. Ethanol has an entirely different visual signature.
If you have an image of a plug reflecting a good fuel to air mixture I'd like to see it to make a comparison.
My engine is a 74' 850, twin Amal 932, NGK - BP7ES spark plugs, crossover exhaust.

I have always been fearful of asking that one myself and have been guessing in a hopeful manner.

Where do you get 92% EtOH on the road?

where are the pictures of your plugs?

Ron L said:

Where do you get 92% EtOH on the road?

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Midwest, STL, major fuel distribution center.

p400 said:

where are the pictures of your plugs?

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No O2 sniffer or dyno, left plug is a hair on the rich side, I've the got the needles shimmed tween top & middle slots, so I may just pull the shim on that side. No ethanol easily found here, using 94 octane pump fuel

Those look nice.

No ethanol, wouldn’t that be nice. In my area it’s either ethanol or aviation fuel.

Only time mine remotely appear like that is when pulling new ones out of the boxes.

Lineslinger: When the non ethanol first started to be sold in Wisconsin, it was at gas stations that sold gas near where boats would fill up.
Most but not all stations now have a non ethanol as their premium gas.
The Kwick Trip chain of stations have it labeled as Recreational Fuel.

franko said:

Lineslinger: When the non ethanol first started to be sold in Wisconsin, it was at gas stations that sold gas near where boats would fill up.
Most but not all stations now have a non ethanol as their premium gas.
The Kwick Trip chain of stations have it labeled as Recreational Fuel.

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N. Carolina is very similar, Frank. It was originally marketed for boats - considering how badly ethanol fuel works when exposed to water or even a humid-air environment - and you'd be more likely to find it near NC coastal marinas or inland recreational-boating lakes. When people realized that it was a much better fuel for lawn mowers, generators, chain saws, etc. the sales areas spread out. Now, if you walk into a gas station and ask "do you have boat gas" or "do you have lawn mower gas", the clerk will know exactly what you mean. It's become pretty common.
Of course, it's sold only as off-road fuel so if I go fill up my gas cans, I'd never put any in my motorcycle -- unless it was for racing, of course. No, no, it would only go in generator (we're near hurricane country here). I wouldn't want to break any laws.

The Blewdy Yaink, B Henderson, N Carolina USA