Ease up lad. Alcohol flashes at 85C perhaps, not 85 deg. F, which is a lot hotter that one would need to run an engine. If you were worried about ignition you could run the engine for a few minutes and let it cool and run it again.
If alcohol flashed at 85F I wouldn't even be able to open a bottle of it here in S. Texas. I assume that the 'alcool' you write about is actually alcohol. I also doubt that even if the alcohol flashed over it would do much damage since it has only about one half the BTUs of gasoline and no where near the violent ignition that gas has.