Author Topic: Ohm resistance of the resistance for the 3.5 tachometer  (Read 2369 times)

opopotts

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Ohm resistance of the resistance for the 3.5 tachometer
« on: April 30, 2022, 21:39:23 »
Does anyone know What the ohm resistance is for the electric tach for the 1971 3.5 coupe so I can buy one ?
Doug

wwheeler

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Re: Ohm resistance of the resistance for the 3.5 tachometer
« Reply #1 on: May 01, 2022, 00:07:47 »
I would think it is the same tach for some earlier cars as well. My ‘68 280SE has an electronic tach. Not sure when they went from mechanical to electronic. Maybe contact people like Pablo Alto speedometer? They may have spares.
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

Benz Dr.

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Re: Ohm resistance of the resistance for the 3.5 tachometer
« Reply #2 on: May 01, 2022, 05:51:10 »
The 250SE coupe uses an electric tack a well. The one I had once and the 250SE Cab. I had here recently both had that feature. I can't say if the V8 tack is different than a 6 cylinder one but there is a part number on the dial face so it could be compared.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

opopotts

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Re: Ohm resistance of the resistance for the 3.5 tachometer
« Reply #3 on: May 04, 2022, 23:28:37 »
I am missing the resistor that  sits on the inner fender of the 3.5 coupes We have the electric tach but the we can't find the resistor that connects to the coil and the distributor. This resistor can be re built if we knew what the resistance was if it was a ceramic or wound coil. Does any body have that spec ?
Thanks
Doug