If i were to really bury the needle on an 85 mph unit and i mean if i were to be going anywhere from one hundred to one hundred fifty miles per hour, would that cause any damage to my speedometer, burying the needle like that?

 

no damage will occur-there is no direct mechanical
linkage from the drive cable to the indicating needle-
there is a aluminum drum connected to the needle
shaft and a rotating magnet inside the drum driven by
the cable-as the magnet rotates,it creates "eddy
currents"in the aluminum drum causing magnetic drag
that rotates the drum against the resistance of the
needle's "clockspring"

 

Perfect. Thanks a bunch

 

Ive put it past the M all the way around, worked fine after!