T&T: Advice on Equalizing & Tackometer?

[Arild Jensen]

  -----Original Message-----
  From: Scott H.E. Welch
   My Detroit has a standard 7/8" - 18 threaded tach drive for mechanical
tachs, and next summer I am planning on adding a standard VDO tach sender.
  For details see the following link:
  http://www.egauges.com/vdo_indS.asp?Sender=VDO_GM_speedo&PN=340-012


  REPLY
  That is not exclusive to VDO.  Its the identical sender I fitted to an
Aetna Tachometer.  - the same one used on USCG boats and a many other yachs
and work boata I have been on. Also works on Catapillar,, big Perkins, MANN
and Lehmans.. At least I saw a mechanical take off on the engine Bob Smith
had a Poulsbo trawler fest. It puts out pulses that can trigger almost any
tachometer.

  This is almost a "universal" adaptor  for when your motor has a mechanical
RPM tak  off.
  Lacking such a mechanical  take of you can use the optical sensor which
requires placing one o rmore reflective spots on a crankshaft pulley
flywhel or other externally accessed rotating part. Remember more pulses per
revolution is better.
  There are no balancing problems with a reflective tape spot.

  Arild