Dwell tachometer 6v pos grd

[50net]

I fortunately found a 6v meter after a long search. Most instructions are gone because of time,but i found one that was still with meter. there are still several out there if someone is looking . search for bt-162/163.

[busycoupe]

I use a 70’s vintage 12V Sears dwell tach to tune my 6V pos ground engine.  I just have to be careful to keep the polarity to the meter correct. It works great.  I would think that other analog 12V meters would work also.

[50net]

According to instructions  this is a 12v/6v meter.you have to connect to a 6v battery and calibrate the meter. So im guessing 12v meters are calibrated to work properly for that voltage? Alot of  vintage meters i inquired about said 12v only

Edited April 26, 2018 by 50net

[Merle Coggins]

I have this dwell meter. It is marked 12v, but it works just fine on my 6v pos ground truck. It only has 2 wires. One goes to the wire between the distributor and coil, the other goes to ground. Just need to verify your polarity. Since most 12v vehicles with points use some sort of voltage reducing resistor for the ignition system, the points work with approximately the same voltage as a 6v vehicle. 

Edited April 27, 2018 by Merle Coggins

[Tubman]

5 hours ago, Merle Coggins said:

I have this dwell meter. It is marked 12v, but it works just fine on my 6v pos ground truck. It only has 2 wires. One goes to the wire between the distributor and coil, the other goes to ground. Just need to verify your polarity. Since most 12v vehicles with points use some sort of voltage reducing resistor for the ignition system, the points work with approximately the same voltage as a 6v vehicle. 

 

Exactly.

[Niel Hoback]

Some timing lights work on low voltage also.