Selling one new VDO three pole diesel tachometer generator with inner and outer extension shaft adapter and drive key for electric VDO tachometers with mechanical in-dial hourmeter.  Price:  $325.00 Non-negotiable plus shipping.  With 7/8"-18 thread pattern fitting and extension shaft adapter.  Made in Germany generator.  4 pulse per revolution 10 Volts AC signal at 1000 RPMs generator.

Standard replacement part for VDO generators number 340.807/1/3 and number 340.807/1/4 and number 340-008.

New, never used or installed, not a return item.  2 business day handling time.  Commonly used on Detroit, Perkins and Caterpillar marine diesel engines.  Also used on Volvo Penta diesel engines equipped with Glendinning engine synchronizers.  Universal 12/24/32 Volt generator.  

Drive key and inner and outer extension shaft adapter are included.  I no longer sell drive keys by themselves, because the usual application for these generators when people buy them from me is almost always on a Glendinning engine synchronizer unit, and the inner tach drive shafts on those units are usually far from perfectly centered in the middle of the 7/8"-18 male threaded stems, and they are also located at the wrong depth, resulting in drive key breakage unless an extension shaft adapter is used.  The flexible inner shaft of an extension shaft adapter compensates for a poorly located drive shaft and prevents drive key breakage.  I don't have any extra drive keys, only the ones that are inside the preassembled generator with extension shaft adapter units that I've put together.  The inner shaft of the included extension adapter has a standard .187" diameter tanged tip.  The outer part of the extension shaft has a standard 7/8"-18 female thread pattern where it hooks up to the engine or the engine synchronizer unit.  The generator has a 7/8"-18 female thread pattern. 

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're reading this after you bought two different items that don't include this one). 

Q:  "I like the price on this one better than the VDO two pole unit number 340-001.  Can I use this one instead of a two pole unit?"

A:  "Yes as long as you don't hook up the terminal marked ZO to anything.  However if the rotational speed exceeds 3,000 RPMs, the drive key will shear in half.  So if your tach takeoff rotates at a 1/1 ratio relative to the crankshaft instead of a 1/2 (.500) ratio, it won't work."

Q:  "Will this work on my Cummins engine?"

A:  "Yes however on a Cummins engine, it will be necessary to run a 90 degree angle drive adapter to keep oil from leaking into the generator.  So unless your Cummins engine already has a 90 degree angle drive adapter, it will be necessary for you to install one.  Ask me about availability and pricing if your Cummins engine doesn't already have a 90 degree angle drive adapter."