Selling one NOS VDO 3,500 RPM 3 and 3/8" diesel tachometer kit with in dial hour meter, with VDO generator sender, extension shaft adapter and drive key.

NOS never used or installed gauge kit, not a return item. 

Fits a 3 and 3/8" or 85mm diameter hole.  The power wire hooks up to your starter switch or gauge panel on/off switch. Will work on 12 Volt applications without requiring a resistor.  On 24 Volt applications, this tachometer will work with VDO voltage dropping resistor kit number 391-102.  Will work on 32 Volt applications with the use of VDO resistor 333-963.  A resistor is not required for the generator sender.  The generator sender is a universal 12/24/32 Volt generator sender.  The tach is calibrated for engines that have a 1/2 (.500 ratio) tachometer cable takeoff (Most Detroit Diesel, Caterpillar, and Cummins and Perkins marine diesel engines).  The inner shaft of the extension adapter has a .187" diameter tanged tip.  The outer shaft of the extension adapter has a 7/8"-18 female thread pattern where it hooks up to the engine or the engine synchronizer unit.  Tach is complete with mounting hardware and lighting socket.

FAQ:

Q:  "I also want to buy X from you.  Is there a way I can buy both parts without having to pay for shipping twice?"

A:  "Yes.  If you buy this from me, after you have paid for it I will then change the shipping price on X to one dollar."

(Note: I will only give this discount if you wait for me to change the shipping price on X.  I won't give the discount if you ask me after you pay for X, or if you are reading this after you bought two different items that don't include this one).