Tachometer needle jumping How To Fix A Bouncy Tach Needle Tachometer needle jumping

It has a 4-3/8 cutout diameter. 0-6000 rpm Tachometer for gas engines. Original replacement gauge for most Sea Ray boats from the mid 1990’s through 2002ish. Replaces Sea Ray part #’s 1291392 912519 0912519, Old Teleflex part# 86297 (printed on the side of the gauge).