have a 182Q, sharp detent in green on temp gauge. about 1/4 inch from bottom of arc. what the heck is thAT? LITTLE POINTY THING STICKING UP FOM GREEN, IN GREEN.
Found the reference to having to change the markings of the oil temp gauge in a conversion to O-470S or U from prior models, but can't find what the difference is.
Thanks. just noticed it the other day and could find no ref. in POH. It just may be a mark intended for reference when scanning. Anyway, thanks for the info.