I must warn you,
DO NOT attempt to adjust your gauge.
I really should update the website. It says I use a sender to calibrate a gauge along with other "shade tree" like statements. Truth is I bought the book of factory specs for all Stuart-Warner / Mopar gauges and senders, along with the equipment to properly test and recalibrate when needed. Nearly every gauge I've touched has needed some adjustment.
There is a bimetal strip inside that bows when heated. Thats what moves the needle. Over time that bimetal strip gets a fixed bow in it where is was originally straight as a arrow. The adjustment is made with a small screw driver in those slots on the back of the gauge ( look again at your gauge ).
again I must warn you,
DO NOT attempt to adjust your gauge.
View attachment 122715
