Hmmm, doesn't a gasser tachometer get the engine speed signal from the 
distributor?  
-- 
Max Dillon
Charleston, SC
'95 E300, '87 300TD, '73 Balboa 20

clay <redgh...@comcast.net> wrote:

>Froggy is not behaving.  But, then again, since when has she?
>
>When I got the car, the tach would swing about wildly in no relation to
>the engine speed.  It would then either pet out or not move at all. 
>Smack the tach face and it might respond.  I knew it was either the amp
>or the gauge, so sourced a fresher gauge.  This new one does sort of
>respond, but not really.  It will register only between 1k and 2k rpm,
>but does move smoothly between them in relation to engine speed.
>
>I have poked around the interwebs for a clue as to where the sensor/amp
>lives.  I am finding much about OM617 cars and diesel, but not anything
>related to a 1974 SL.  Does this thing live on the engine or the
>transmission?  And where should I be looking for the critter?
>
>
>
>clay 
>
>
>1974 450sl -  Frosch - Two tone green
>1972 220D - Gump - She was green, simple and ran
>1995 E300D - Gave her life to save me against a Dame in a SUV
>POS 1987 SDL - Beware Nigerian Scammers
>
>
>
>
>
>
>
>
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