Greetings,
Thanks to EVERYONE for their input. SactoMitch - thanks for the gauge graphic and calibration numbers for cool to very hot. A picture really is worth a thousand words. GordonNichols - thanks for the wallet savings on the candy thermometer. LfePardo - thanks for the temp ranges, links, offer to help read a multimeter......
Going to forgo moving the temp sender to the drain plug location although that would probably render a more accurate reading? Worried I may scrap it off should I bottom out.
Think I'm ready to calibrate my gauge (if the gauge continues working) and how to shop for and change out a new sender should it not.
Thanks again to everyone,
Marshall