tach calibration

Last weekend i connected up the tachometer and had some issues and just thought to put it out there and ask for any suggestions ?

[@VITOSGARAGE]

With engine OFF, Move the tach needle counterclockwise until it's at 0 RPMS. Start the engine. The RPMS should be around 800 or so. You might have to pull out clock needles in order to move the tach needle counterclockwise.

[@kjellin3818]

How is it wired? Im installing a tach on my 250diesel and im wondering how to wire the sensor on the back

[@mohamedfiraz7041]

Can I know where do u connect the 2 pin wire from the back side?

[@qwertyui90qwertyui90]

a 12v line is to the clock. then there is a Power +12v line as a power source to the tach then there is a signal wire that goes to the pickup that's in front/above of the engine crankshaft pulley then the body of the unit is the 'ground' so make sure it's nice and screwed into the back of the instrument cluster.

[@mohamedfiraz7041]

@@qwertyui90qwertyui90 Thank you

[@mercedesclassicswithpierre1753]

what model is this?

[@qwertyui90qwertyui90]

W123 280CE with om617A transplanted in.

[@qwertyui90qwertyui90]

Also, really happy you looked at my video Pierre :D