Page 1 8/10/2019 VDO Diesel Tach Guage http://slidepdf.com/reader/full/vdo-diesel-tach-guage 1/2Page 2 8/10/2019 VDO Diesel Tach Guage http://slidepdf.com/reader/full/vdo-diesel-tach-guage 2/2 CONTINUE HERE Mounting hole dimension = 2 ¹⁄₁₆ " (52 mm)